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Journal articles on the topic 'Heat mass transfers'

Author: Grafiati

Published: 4 June 2021

Last updated: 28 January 2023

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1

Abidi, Awatef, Zehba Raizah, and Jamel Madiouli. "Magnetic Field Effect on the Double Diffusive Natural Convection in Three-Dimensional Cavity Filled with Micropolar Nanofluid." Applied Sciences 8, no. 12 (November 22, 2018): 2342. http://dx.doi.org/10.3390/app8122342.

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This article presents a three-dimensional numerical investigation of heat and mass transfers and fluid flow in a cavity filled with an Al2O3/water micropolar fluid under uniform magnetic field. To solve the governing non-dimensional equations, Finite Volume Method (FVM) based on 3-D vorticity-vector potential formulation has been employed. The effects of various parameters such as buoyancy ratio (−2 ≤ N ≤ 0), Rayleigh number (103 ≤ Ra ≤ 105), Hartmann number (0≤ Ha≤ 60), nanoparticles volume fraction (0 ≤ φ ≤ 0.06) and micropolar material parameter (0≤ K≤ 5) on flow structure and on heat and mass transfers are presented. The results illustrate that for the micropolar nanofluid model, both heat and mass transfer rates and three-dimensional character of the flow are smaller when compared with the pure nanofluid model. It is also observed that increase and decrease in heat and mass transfer rates is experienced due to increase in Rayleigh number and Hartmann number, respectively. It is also noted that increase in vortex viscosity parameter reduces the average heat and mass transfer rates and is more evident when the magnetic field is imposed. Combined effects of magnetic field and nanoparticles volume fraction on heat and mass transfers are also explored.

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2

PORCHERON, Emmanuel, Pascal LEMAITRE, Denis MARCHAND, Amandine NUBOER, and Jacques VENDEL. "ICONE15-10328 HEAT, MASS AND AEROSOLS TRANSFERS IN SPRAY CONDITIONS FOR CONTAINMENT APPLICATION." Proceedings of the International Conference on Nuclear Engineering (ICONE) 2007.15 (2007): _ICONE1510. http://dx.doi.org/10.1299/jsmeicone.2007.15._icone1510_166.

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3

Amari, Imen, and M. H. Chahbani. "Modeling and Simulation of Combined Heat and Mass Transfer in Zeolite SAPO-34 Coating for an Adsorption Heat Pump." Advances in Materials Science and Engineering 2021 (September 30, 2021): 1–11. http://dx.doi.org/10.1155/2021/3706981.

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Heat and mass transfers inside an adsorbent bed of an adsorption heat pump (AHP) are considered poor; consequently, they can cause low system performance. They should be enhanced so as to increase the coefficient of performance of the cooling machine. The aim of this work is to study an adsorbent bed coated with the zeolite SAPO-34. A simulation model based on governing equations for energy, mass, and momentum transfers is developed using COMSOL Multiphysics software. The system zeolite SAPO-34/water has been considered. Modeling results are validated by experimental database available at the Institute for Advanced Energy Technologies “Nicola Giordano,” Italy. It has been shown that the adsorption heat pump performance is affected by both heat and mass transfer. The enhancement of heat transfer solely is not sufficient to attain high values of specific cooling power. In the case of water vapor/SAPO-34 pair, mass transfer has a significant impact on the duration of the cooling step which should be shortened if one would want to increase the specific cooling power. The sole way to do it is to enhance mass transfer inside porous adsorbent.

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4

Min, J. C., and M. Su. "Heat and Mass Transfers and their Mutual Effects in Membrane Processes." Defect and Diffusion Forum 297-301 (April 2010): 676–81. http://dx.doi.org/10.4028/www.scientific.net/ddf.297-301.676.

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A mathematical model was developed to describe the coupled heat and mass transfers in membrane processes. Equations for the heat and mass transfer resistances were derived and the coupling effects of the heat and mass transfer were analyzed. With taking the membrane separation process of moist air as an example, the effects of air temperature and water vapor concentration on the heat and moisture transfer process were investigated. The results show that neither the thermal resistance nor the moisture resistance are constant, they are affected by not only the membrane parameters but also the air state. As the temperature difference between the two airstreams separated by the membrane increases, both the thermal and moisture resistances decrease, causing an improved heat and mass transfer. As the average temperature of the two airstreams increases, the thermal resistance remains almost constant while the moisture resistance decreases significantly. Further, as the water vapor concentration difference between the two airstreams increases, both the thermal and moisture resistances increase. As the average water vapor concentration of the two airstreams increases, the thermal resistance remains unchanged while the moisture resistance decreases.

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5

Seth, G. S., R. Kumar, and R. Tripathi. "Thermo-diffusion effects on the magnetohydrodynamic natural convection flow of a chemically reactive Brinkman type nanofluid in a porous medium." Bulgarian Chemical Communications 51, no. 2 (2019): 168–79. http://dx.doi.org/10.34049/bcc.51.2.4577.

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An investigation on the unsteady MHD natural convection heat and mass transfer flow of an electrically conducting, viscous, incompressible, chemically reactive and heat-absorbing nanofluid of Brinkman type past an exponentially accelerated moving vertical plate with ramped wall temperature and ramped surface concentration is carried out. Governing equations are non-dimensionalized and Laplace Transform Technique is used to find the exact solutions for fluid velocity, fluid temperature and species concentration. The quantities of physical interest, i.e. skin friction, rates of heat and mass transfers at the plate are also calculated. Numerical results for the velocity, temperature and species concentration of the fluid are demonstrated with the help of graphs whereas those of skin friction, rate of heat and mass transfers at the plate are displayed in tables for various flow parameters.

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6

Rahman, MS, R. Nasrin, and MI Hoque. "Heat-Mass Transfer of Nanofluid in Lid-Driven Enclosure under three Convective Modes." GANIT: Journal of Bangladesh Mathematical Society 38 (January 14, 2019): 73–83. http://dx.doi.org/10.3329/ganit.v38i0.39787.

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Heat is a form of energy which transfers between bodies which are kept under thermal interactions. When a temperature difference occurs between two bodies or a body with its surroundings, heat transfer occurs. Heat transfer occurs in three modes. Three modes of heat transfer are conduction, convection and radiation. Convection is a very important phenomenon in heat transfer applications and it occurs due to two different gradients, such as, temperature and concentration. This paper reports a numerical study on forced-mixed-natural convections within a lid-driven square enclosure, filled with a mixture of water and 2% concentrated Cu nanoparticles. It is assumed that the temperature difference driving the convection comes from the side moving walls, when both horizontal walls are kept insulated. In order to solve general coupled equations, a code based on the Galerkin's finite element method is used. To make clear the effect of using nanofluid on heat and mass transfers inside the enclosure, a wide range of the Richardson number, taken from 0.1 to 10 is studied. A fair degree of precision can be found between the present and previously published works. The phenomenon is analyzed through streamlines, isotherm and iso-concentration plots, with special attention to the Nusselt number and Sherwood number. The larger heat and mass transfer rates can be achieved with nanofluid than the base fluid for all conditions at Richardson number, Ri = 0.1 to 10. It has been found that the heat and mass transfer rate increase approximately 6% for water with the increase of Ri = 0.1 to 10, whereas these increase about 34% for nanofluid. GANIT J. Bangladesh Math. Soc.Vol. 38 (2018) 73-83

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7

Farhangmehr, Vahid, Hesam Moghadasi, and Sasan Asiaei. "A nanofluid MHD flow with heat and mass transfers over a sheet by nonlinear boundary conditions: Heat and mass transfers enhancement." Journal of Central South University 26, no. 5 (May 2019): 1205–17. http://dx.doi.org/10.1007/s11771-019-4081-z.

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8

Stabat, Pascal, and Dominique Marchio. "Heat-and-mass transfers modelled for rotary desiccant dehumidifiers." Applied Energy 85, no. 2-3 (February 2008): 128–42. http://dx.doi.org/10.1016/j.apenergy.2007.06.017.

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9

Zhang, Jianhua, Stephen Gray, and Jun-De Li. "Modelling heat and mass transfers in DCMD using compressible membranes." Journal of Membrane Science 387-388 (January 2012): 7–16. http://dx.doi.org/10.1016/j.memsci.2011.08.034.

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10

Hammami, Youness El, Kaoutar Zine-Dine, Rachid Mir, Touria Midiouni, and Mustapha Ait Hssain. "Numerical Simulation of Volatile Organic Compounds during Condensation in a Vertical Tube." Proceedings 38, no. 1 (December 26, 2020): 21. http://dx.doi.org/10.3390/proceedings2019038021.

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The purpose of this study is to analyze the combined heat and mass transfer through condensation of volatile organic compounds (VOCs), particularly alcohol (n-butanol-propanol) in the presence of non-condensable gas inside a vertical tube. An implicit finite difference method is employed to solve the coupled governing equations for liquid film and gas flow together with the interfacial matching conditions. The numerical results indicate that the Transfers are more intense at the entrance of the tube for the ternary mixture and promote heat and mass exchanges.

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11

Nitcheu, Madeleine, Donatien Njomo, Pierre Meukam, and Cyrille Fotsing Talla. "Modeling of Coupled Heat and Mass Transfers in a Stabilized Earthen Building Envelope with Thatched Fibers." Fibers 6, no. 4 (October 2, 2018): 75. http://dx.doi.org/10.3390/fib6040075.

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In order to reduce the heat and mass transfers in buildings, which increase energy bills, the development of composites materials such as earth bricks stabilized with thatch fibers is important for their construction. This paper aims to study a one-dimensional model of heat and moisture transfer through porous building materials. The coupled phenomena of heat and mass transfer are described by the Luikov model. Equations and boundary conditions are discretized using the finite difference method. The results obtained illustrate the temporal evolutions of the temperature and the moisture content, as well as the distributions of the temperature and moisture content inside the wall. The profile of the temperature and water content that are obtained are compared with the other numerical solutions that are available in the literature.

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12

Yadav, Dhananjay, Maimouna Al-Siyabi, Mukesh Kumar Awasthi, Salma Al-Nadhairi, Amna Al-Rahbi, Maryam Al-Subhi, Ravi Ragoju, and Krishnendu Bhattacharyya. "Chemical Reaction and Internal Heating Effects on the Double Diffusive Convection in Porous Membrane Enclosures Soaked with Maxwell Fluid." Membranes 12, no. 3 (March 18, 2022): 338. http://dx.doi.org/10.3390/membranes12030338.

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In this paper, the joint impact of the interior heating and chemical reaction on the double diffusive convective flow in porous membrane enclosures soaked by a non-Newtonian Maxwell fluid is investigated applying linear and nonlinear stability techniques. The porous enclosures are square, slender and rectangular. Using the linear stability analysis, the expression for the critical thermal Rayleigh–Darcy number, above which the convective movement occurs, is derived analytically in terms of associated physical parameters. A nonlinear stability examination reliant on the Fourier double series is executed to calculate the convective heat and mass transports of the arrangement. It is observed that the pattern of convective activity is oscillatory only in the occurrence of a relaxation parameter and the threshold value of the relaxation parameter for the occurrence of the oscillatory pattern depends on the other physical parameters. The onset of convective instability accelerates with the increasing chemical reacting parameter, the interior heating parameter, the solute Rayleigh–Darcy number, the Lewis number, the Vadasz number, and the relaxation parameter, while it delays with the heat capacity ratio. The convective heat and mass transfers increase with the solute Rayleigh–Darcy number, the Vadasz number, the relaxation parameter, and the aspect ratio (for rectangular enclosure), while it decreases with the heat capacity ratio and the aspect ratio (for slender enclosure). Additionally, the convective heat transfer enhances with the interior heating parameter, while the convective mass transfer enhances with the chemical reacting parameter and the Lewis number. The effects of Vadasz number, heat capacity ratio, and relaxation parameter are witnessed only on the oscillatory pattern of convection and unsteady convective heat and mass transfers. Further, some existing literature results are compared with the current findings.

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13

Bulinda, Vincent M., Giterere P. Kang’ethe, and Phineas R. Kiogora. "Magnetohydrodynamics Free Convection Flow of Incompressible Fluids over Corrugated Vibrating Bottom Surface with Hall Currents and Heat and Mass Transfers." Journal of Applied Mathematics 2020 (March 1, 2020): 1–10. http://dx.doi.org/10.1155/2020/2589760.

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Magnetohydrodynamics free convection flow of incompressible fluids over corrugated vibrating bottom surface with Hall currents and heat and mass transfers considering heat flux is discussed. The corrugation patterns suggested are sinusoidal in nature. The governing equations are solved by the explicit finite difference numerical method of the forward-time backward-space scheme to obtain the analytical results for velocity, concentration, and temperature profiles. The unsteady resultant velocities, concentration, and temperature for various values of physical parameters are discussed in detail, and it is shown that they have significant effects on the fluid flow, and heat and mass transfers are shown graphically.

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14

Iqbal, Khan, Mustafa, and Ghaffari. "Numerical Study of Natural Convection Flow of Nanofluid Past a Circular Cone with Cattaneo–Christov Heat and Mass Flux Models." Symmetry 11, no. 11 (November 3, 2019): 1363. http://dx.doi.org/10.3390/sym11111363.

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The objective of this study is to analyze the natural convection flow of nanofluid along a circular cone placed in a vertical direction. The generalized heat flux and mass flux models are commonly known as the Cattaneo–Christov heat flux model and mass flux models. In the present study, these models are used for both heat and mass transfers analysis in nanofluid flow. For the governing equations, the Buongiorno transport model is used in which two important slip mechanism, namely thermophoresis and Brownian motion parameters, are discussed. The resulting governing equations in the form of partial differential equations (PDEs) are converted into ordinary differential equations (ODEs) due to similar flow along the surface of a circular cone. To solve these ODEs, a numerical algorithm based on implicit finite difference scheme is utilized. The effects of dimensionless parameters on heat and mass transfer in nanofluid flow are discussed graphically in the form of velocity profile, temperature profile, Sherwood number and Nusselt number. It is noted that in the presence of the Cattaneo–Christov heat flux model and mass flux model, the heat transfer rate decreases by increasing both thermal and concentration relaxation parameters; however, Sherwood number decreases by increasing the thermal relaxation parameter, and increases by increasing the concentration relaxation parameter.

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15

Hussain, Hamed J. "Improving the Heat Transfer using Fe3O4 Nanoparticles Suspended in Water Flow through Circular Tube." Journal of Petroleum Research and Studies 12, no. 3 (September 11, 2022): 92–103. http://dx.doi.org/10.52716/jprs.v12i3.539.

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The new class of pressure drop and heat transfer enhancement through pipes and heat exchangers is defined a nano-fluid. The applications of this process are the cooling of oil inside heat exchanger and the flow of oil into the pipe line. In this work, the prediction of heat transfers and friction factor in a heated tube is studied. ANSYS software of CFD simulation through the geometrical problem undertaken was utilized. The Fe3O4 nanoparticles suspended in pure water has been adopted to flow through the test rig under ranges of nanoparticles mass concentrations and Reynolds number 1% to 4% and 4000 to 10000 respectively. The numerical results show that the friction factor and heat transfer enhancement increase as increase of nanoparticles mass concentrations 23% and 4% respectively. Additionally, the heat transfer is increased and the friction factor is decreased as increase of Reynolds number. It was concluded that Nusselt number increases due to add the solid nanoparticles to the water but slightly increases of pumping power. This obtained results are validated with the available data in the literature.

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16

Nogueira, E., B. D. Dantas, and R. M. Cotta. "ANALYSIS OF INTERFACIAL AND MASS TRANSFER EFFECTS ON FORCED CONVECTION IN GAS-LIQUID ANNULAR TWO-PHASE FLOW." Revista de Engenharia Térmica 3, no. 1 (June 30, 2004): 45. http://dx.doi.org/10.5380/reterm.v3i1.3483.

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In a gas-liquid annular two-phase flow one of the main factors influencing the determination of heat transfer rates is the average thickness of the liquid film. A model to accurately represent the heat transfer in such situations has to be able of determining the average liquid film thickness to within a reasonable accuracy. A typical physical aspect in gas-liquid annular flows is the appearance of interface waves, which affect heat, mass and momentum transfers. Existing models implicitly consider the wave effects in the momentum transfer by an empirical correlation for the interfacial friction factor. However, this procedure does not point out the difference between interface waves and the natural turbulent effects of the system. In the present work, the wave and mass transfer effects in the theoretical estimation of average liquid film thickness are analyzed, in comparison to a model that does not explicitly include these effects, as applied to the prediction of heat transfer rates in a thermally developing flow situation.

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17

Lu, Yingying, Yiqiang Pei, Binyang Wu, and Yize Liu. "Influence of charge density and oxygen concentration on combustion paths, thermal efficiency and emissions in a heavy-duty diesel engine." Advances in Mechanical Engineering 12, no. 12 (December 2020): 168781402098438. http://dx.doi.org/10.1177/1687814020984389.

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Experiments and simulations were conducted to study effects of charge density, temperature, and oxygen concentration on the mixing-controlled engine combustion pathway in heavy-duty diesel engines. Due to the inherent heterogeneity of diesel combustion in high-load operations, the rich and lean mixtures are simultaneous present. The mass and accompanying heat transfers were found to be decisive in determining the combustion path. The chemical transformation from a richer mixture to a leaner mixture is primarily driven by charge density, which activates the combustion process, and reduction in oxygen concentration, which stagnates the mass and heat transfer and chemical transformation, reduces the reactivity of the mixtures. The difference in mass and heat transfer processes causes differences in the mass fractions of mixtures with different equivalence ratio intervals. The different mixtures produce different mass fractions of intermediate combustion products (carbon dioxide, CO), different heat releases, and different mass temperature distributions. It is found that the accumulated CO correlates well with the gross indicated thermal efficiency and soot emission; the mass averaged temperature and the high temperature abidance scale (HTAS) correlate well with NOx emissions. A significant optimization of the overall engine performance could be achieved by simultaneously minimizing the HTAS and accumulated CO.

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18

Waini, Iskandar, Umair Khan, Aurang Zaib, Anuar Ishak, Ioan Pop, and Nevzat Akkurt. "Time-Dependent Flow of Water-Based CoFe2O4-Mn-ZnFe2O4 Nanoparticles over a Shrinking Sheet with Mass Transfer Effect in Porous Media." Nanomaterials 12, no. 22 (November 21, 2022): 4102. http://dx.doi.org/10.3390/nano12224102.

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The use of hybrid nanoparticles to increase heat transfer is a favorable area of research, and therefore, numerous scientists, researchers, and scholars have expressed their appreciation for and interest in this field. Determining the dynamic role of nanofluids in the cooling of microscopic electronic gadgets, such as microchips and related devices, is also one of the fundamental tasks. With such interesting and useful applications of hybrid nanofluids in mind, the main objective is to deal with the analysis of the unsteady flow towards a shrinking sheet in a water-based hybrid ferrite nanoparticle in porous media, with heat sink/source effects. Moreover, the impact of these parameters on heat and mass transfers is also reported. Numerical results are obtained using MATLAB software. Non-unique solutions are determined for a certain shrinking strength, in addition to the unsteadiness parameter. The mass transfer and friction factor increase for the first solution due to the hybrid nanoparticles, but the heat transfer rate shows the opposite effect.

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19

Zhang, Yudong, Aiguo Xu, Feng Chen, Chuandong Lin, and Zon-Han Wei. "Non-equilibrium characteristics of mass and heat transfers in the slip flow." AIP Advances 12, no. 3 (March 1, 2022): 035347. http://dx.doi.org/10.1063/5.0086400.

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Slip flow is a common phenomenon in micro-/nano-electromechanical systems. It is well known that the mass and heat transfers in slip flow show many unique behaviors, such as the velocity slip and temperature jump near the wall. However, the kinetic understanding of slip flow is still an open problem. This paper first clarifies that the Thermodynamic Non-Equilibrium (TNE) flows can be roughly classified into two categories: near-wall TNE flows and TNE flows away from the wall. The origins of TNE in the two cases are significantly different. For the former, the TNE mainly results from the fluid–wall interaction; for the latter, the TNE is primarily due to the considerable (local) thermodynamic relaxation time. Therefore, the kinetic modeling methods for the two kinds of TNE flows are significantly different. Based on the Discrete Boltzmann Modeling (DBM) method, the non-equilibrium characteristics of mass and heat transfers in slip flow are demonstrated and investigated. The method is solidly verified by comparing with analytic solutions and experimental data. In pressure-driven flow, the DBM results are consistent with experimental data for the Knudsen number up to 0.5. It is verified that, in the slip flow regime, the linear constitutive relations with standard viscous or heat conduction coefficients are no longer applicable near the wall. For the Knudsen layer problem, it is interesting to find that a heat flux (viscous stress) component in the velocity (temperature) Knudsen layer approximates a hyperbolic sinusoidal distribution. The findings enrich the insights into the non-equilibrium characteristics of mass and heat transfers at micro-/nano-scales.

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20

Duan, Yi Wen, Li Ping Chen, and Da Lai Si Qin. "Introduction to Analysis-Simplified and Extension in Momentum, Heat and Mass Transfers." Advanced Materials Research 516-517 (May 2012): 332–35. http://dx.doi.org/10.4028/www.scientific.net/amr.516-517.332.

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21

Amara, M., and M. El Ganaoui. "Simulation of heat and mass transfers inside a nanopowders synthesis reactor." Progress in Computational Fluid Dynamics, An International Journal 6, no. 6 (2006): 371. http://dx.doi.org/10.1504/pcfd.2006.010779.

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22

Berger, Xavier, and Hayet Sari. "A new dynamic clothing model. Part 1: Heat and mass transfers." International Journal of Thermal Sciences 39, no. 5 (May 2000): 635–45. http://dx.doi.org/10.1016/s1290-0729(00)00211-8.

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23

Berger, Xavier, and Hayet Sari. "A new dynamic clothing model. Part 1: Heat and mass transfers." International Journal of Thermal Sciences 39, no. 6 (June 2000): 673–83. http://dx.doi.org/10.1016/s1290-0729(80)00211-6.

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24

PORCHERON, Emmanuel, Pascal LEMAITRE, Amandine NUBOER, and Jacques VENDEL. "Heat, Mass and Aerosol Transfers in Spray Conditions for Containment Application." Journal of Power and Energy Systems 2, no. 2 (2008): 633–47. http://dx.doi.org/10.1299/jpes.2.633.

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25

Li, Qiang, and Wenjing Yang. "Study on gas-droplet heat and mass transfers in oscillating flows." International Journal of Heat and Mass Transfer 126 (November 2018): 52–60. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2018.05.008.

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26

Lebrun, M., and B. Spinner. "Models of heat and mass transfers in solid—gas reactors used as chemical heat pumps." Chemical Engineering Science 45, no. 7 (1990): 1743–53. http://dx.doi.org/10.1016/0009-2509(90)87052-t.

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27

Ountaksinkul, Khunnawat, Sippakorn Wannakao, Piyasan Praserthdam, and Suttichai Assabumrungrat. "Intrinsic kinetic study of 1-butene isomerization over magnesium oxide catalyst via a Berty stationary catalyst basket reactor." RSC Advances 10, no. 60 (2020): 36667–77. http://dx.doi.org/10.1039/d0ra05453d.

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The intrinsic kinetics of 1-butene isomerization over a commercial MgO catalyst was studied by using a Berty-type reactor (gradient-less recycle reactor) without limitations of heat-, external mass-, and internal mass-transfers.

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28

Vlasyuk, Anatoliy, Ihor Ilkiv, and Tetiana Tsvietkova. "Mathematical and computer modelling of interconnected processes of moisture- and heat mass transfer in non-saturated soil layer." Physico-mathematical modelling and informational technologies, no. 32 (July 7, 2021): 75–79. http://dx.doi.org/10.15407/fmmit2021.32.075.

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The paper presents the mathematical modelling of joint processes of moisture transfer and mass transfer in a non-saturated medium taking into account Osmos phenomena under non-isothermic conditions. Numeric calculations of corresponding boundary tasks were found by a method of finite differences using non-evident and monotonous differential schemes adapted for solving non-linear differential equations. As a result of program implementation of the constructed calculation algorithm, the distribution was found of salt solutions concentration under joint transfers and the impact of heat transfer was determined upon distributions of moisture heads and salts concentration in a soil mass. Obtained results may be used to determine moisture heads and salts solutions spreading in soils which is an applied task.

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29

Klein, Jean-Marie, Jonathan Deseure, and Yann Bultel. "Simulations of Heat and Mass Transfers in Tubular Solid Oxide Electrolysis Cell." ECS Transactions 25, no. 2 (December 17, 2019): 1305–14. http://dx.doi.org/10.1149/1.3205659.

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Papadimitrakis, Y. A., Y. H. L. Hsu, and J. Wu. "Turbulent heat and mass transfers across a thermally stratified air-water interface." Journal of Geophysical Research 91, no. C9 (1986): 10607. http://dx.doi.org/10.1029/jc091ic09p10607.

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31

Issa, M., K. Ishida, and M. Monde. "MASS AND HEAT TRANSFERS DURING ABSORPTION OF AMMONIA INTO AMMONIA WATER MIXTURE." International Communications in Heat and Mass Transfer 29, no. 6 (August 2002): 773–86. http://dx.doi.org/10.1016/s0735-1933(02)00368-8.

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32

Xiaodong, Wang, Fautrelle Yves, Moreau René, Etay Jacqueline, Bianchi Ana-Maria, Baltaretu Florin, and Na Xianzhao. "Flow, heat and mass transfers during solidification under traveling/rotating magnetic field." International Journal of Energy and Environmental Engineering 6, no. 4 (June 10, 2015): 367–73. http://dx.doi.org/10.1007/s40095-015-0181-1.

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33

Souiy, Z., A. Ben Moussa, and H. Ksibi. "Numerical Simulation of Heat and Mass Transfers in a Supercritical Dissolution Column." Chemical Engineering & Technology 30, no. 6 (June 2007): 715–20. http://dx.doi.org/10.1002/ceat.200600371.

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34

محمد, Hozaifa Adel, El-Sayed Rajab نجيد, and Majed Mala الحازمي. "Experimental investigation of increasing heat transfers inside a double pipe heat exchanger by using Al2O3 nanofluid." Journal of engineering sciences and information technology 6, no. 3 (June 30, 2022): 107–23. http://dx.doi.org/10.26389/ajsrp.f201221.

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The aim of the present study is to investigation of increasing of the heat transfer coefficient inside the double tube. This is done by mixing water with aluminum oxide nanoparticles (Al2O3), the study was carried out experimentally. In this study, the effects of nanofluids at different volume concentrations from 0.05% to 0.4%, different mass flow rates of the nanofluids inside the tube, and different mass flow rates of the water flow through the annulus were tested. Experiments done with different nanoparticles and without nanoparticles under the same operating conditions. The experiment was designed, and built in the laboratory according to the international specifications and standards of the tubular exchanger manufacturers association (TEMA). By collecting and analyzing the results of the experiments, it was found that the nanoparticles have a significant improvement in the heat transfer coefficient inside the double tube. The heat transfer coefficient inside the tube increases with the increase the Reynolds number of the tube flow. The maximum value of the Nusselt number is when the volume concentration of Al2O3 nanoparticles is 0.1%.

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35

Lima, Elisiane S., João M. P. Q. Delgado, Ana S. Guimarães, Wanderson M. P. B. Lima, Ivonete B. Santos, Josivanda P. Gomes, Rosilda S. Santos, et al. "Drying and Heating Processes in Arbitrarily Shaped Clay Materials Using Lumped Phenomenological Modeling." Energies 14, no. 14 (July 16, 2021): 4294. http://dx.doi.org/10.3390/en14144294.

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This work aims to study the drying of clay ceramic materials with arbitrary shapes theoretically. Advanced phenomenological mathematical models based on lumped analysis and their exact solutions are presented to predict the heat and mass transfers in the porous material and estimate the transport coefficients. Application has been made in hollow ceramic bricks. Different simulations were carried out to evaluate the effect of drying air conditions (relative humidity and speed) under conditions of forced and natural convection. The transient results of the moisture content and temperature of the brick, and the convective heat and mass transfer coefficients are presented, discussed and compared with experimental data, obtaining a good agreement. It was found that the lower the relative humidity is and the higher the speed of the drying air is, the higher the convective heat and mass transfer coefficients are at the surface of the brick and in the holes, and the faster the moisture removal material and heating is. Based on the predicted results, the best conditions for brick drying were given. The idea is to increase the quality of the brick after the process, to reduce the waste of raw material and energy consumption in the process.

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36

Nasr, Mohamed E., Machireddy Gnaneswara Gnaneswara Reddy, W. Abbas, Ahmed M. Megahed, Essam Awwad, and Khalil M. Khalil. "Analysis of Non-Linear Radiation and Activation Energy Analysis on Hydromagnetic Reiner–Philippoff Fluid Flow with Cattaneo–Christov Double Diffusions." Mathematics 10, no. 9 (May 3, 2022): 1534. http://dx.doi.org/10.3390/math10091534.

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Using magnetohydrodynamics (MHD), the thermal energy and mass transport boundary layer flow parameters of Reiner–Philippoff fluid (non-Newtonian) are numerically investigated. In terms of energy and mass transfer, non-linear radiation, Cattaneo–Christov double diffusions, convective conditions at the surface, and the species reaction pertaining to activation energy are all addressed. The stated governing system of partial differential equations (PDEs) is drained into a non-linear differential system using appropriate similarity variables. Numerical solutions are found for the flow equations that have been determined. Two-dimensional charts are employed to demonstrate the flow field, temperature and species distributions, and rate of heat and mass transfers for the concerned parameters for both Newtonian and Reiner–Philippoff fluid examples. The stream line phenomenon is also mentioned in this paper. A table has also been utilized to illustrate the comparison with published results, which shows that the current numerical data are in good accord. The findings point to a new role for heat and mass transfer. According to the findings, increasing values of solutal and thermal relaxation time parameters diminish the associated mass and thermal energy layers. The current study has significant ramifications for chemical engineering systems.

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Li, Ming Chun, Yu Sheng Wu, and Ying Tao Song. "The Coupled Heat and Mass Transfers in the Endothermic Chemical Reaction Packed Beds." Advanced Materials Research 402 (November 2011): 436–41. http://dx.doi.org/10.4028/www.scientific.net/amr.402.436.

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According to the assumption of local thermal non-equilibrium and the heat transfer controlled regime, a mathematical model describing the coupling between the heat and mass transfer processes in a porous packed bed with endothermic chemical reactions was established and solved by the alternate dimension implicit method. The calculated results showed that, the profiles of the temperature distributions of the two phases and the solid conversion ratio all decay near the radial boundary wall corresponding to the momentum boundary layer. However, the concentration of the product gas increases near the wall owing to the slower speed layer. The temperatures difference between the gas flow and solid pellets can not be ignored during the study of ore decomposition in the porous packed bed. The reaction features of the packed bed with endothermic reactions under different conditions can be analyzed by the established model.

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38

Salleh, Siti Nur Alwani, Norfifah Bachok, Norihan Md Arifin, and Fadzilah Md Ali. "Numerical Analysis of Boundary Layer Flow Adjacent to a Thin Needle in Nanofluid with the Presence of Heat Source and Chemical Reaction." Symmetry 11, no. 4 (April 15, 2019): 543. http://dx.doi.org/10.3390/sym11040543.

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The steady boundary layer flow of a nanofluid past a thin needle under the influences of heat generation and chemical reaction is analyzed in the present work. The mathematical model has been formulated by using Buongiornos’s nanofluid model which incorporates the effect of the Brownian motion and thermophoretic diffusion. The governing coupled partial differential equations are transformed into a set of nonlinear ordinary differential equations by using appropriate similarity transformations. These equations are then computed numerically through MATLAB software using the implemented package called bvp4c. The influences of various parameters such as Brownian motion, thermophoresis, velocity ratio, needle thickness, heat generation and chemical reaction parameters on the flow, heat and mass characteristics are investigated. The physical characteristics which include the skin friction, heat and mass transfers, velocity, temperature and concentration are further elaborated with the variation of governing parameters and presented through graphs. It is observed that the multiple (dual) solutions are likely to exist when the needle moves against the direction of the fluid flow. It is also noticed that the reduction in needle thickness contributes to the enlargement of the region of the dual solutions. The determination of the stable solution has been done using a stability analysis. The results indicate that the upper branch solutions are linearly stable, while the lower branch solutions are linearly unstable. The study also revealed that the rate of heat transfer is a decreasing function of heat generation parameter, while the rate of mass transfer is an increasing function of heat generation and chemical reaction parameters.

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39

Hassine, Nidhal Ben, Xavier Chesneau, and Ali Hatem Laatar. "NUMERICAL MODELING OF HEAT AND MASS TRANSFERS UNDER SOLAR DRYING OF SEWAGE SLUDGE." Heat Transfer Research 49, no. 4 (2018): 327–48. http://dx.doi.org/10.1615/heattransres.2018017977.

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Chevalier, S., J. N. Tourvieille, A. Sommier, and C. Pradère. "Infrared thermospectroscopic imaging of heat and mass transfers in laminar microfluidic reactive flows." Chemical Engineering Journal Advances 8 (November 2021): 100166. http://dx.doi.org/10.1016/j.ceja.2021.100166.

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41

Puértolas, B., M. V. Navarro, J. M. Lopez, R. Murillo, A. M. Mastral, and T. Garcia. "Modelling the heat and mass transfers of propane onto a ZSM-5 zeolite." Separation and Purification Technology 86 (February 2012): 127–36. http://dx.doi.org/10.1016/j.seppur.2011.10.036.

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42

Maalem, M. S., A. Benzaoui, and A. Bouhenna. "Modeling of simultaneous transfers of heat and mass in a trapezoidal solar distiller." Desalination 344 (July 2014): 371–82. http://dx.doi.org/10.1016/j.desal.2014.03.042.

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Sanchez-Roman, Antonio, Gabriel Jorda, Gianmaria Sannino, and Damia Gomis. "Modelling study of transformations of the exchange flows along the Strait of Gibraltar." Ocean Science 14, no. 6 (December 18, 2018): 1547–66. http://dx.doi.org/10.5194/os-14-1547-2018.

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Abstract. Vertical transfers of heat, salt and mass between the inflowing and outflowing layers at the Strait of Gibraltar are explored basing on the outputs of a three-dimensional fully nonlinear numerical model. The model covers the entire Mediterranean basin and has a very high spatial resolution around the strait (1/200∘). Another distinctive feature of the model is that it includes a realistic barotropic tidal forcing (diurnal and semi-diurnal), in addition to atmospheric pressure and heat and water surface fluxes. The results show a significant transformation of the properties of the inflowing and outflowing water masses along their path through the strait. This transformation is mainly induced by the recirculation of water, and therefore of heat and salt, between the inflowing and outflowing layers. The underlying process seems to be the hydraulic control acting at the Espartel section, Camarinal Sill and Tarifa Narrows, which limits the amount of water that can cross the sections and forces a vertical recirculation. This results in a complex spatio-temporal pattern of vertical transfers, with the sign of the net vertical transfer being opposite in each side of the Camarinal Sill. Conversely, the mixing seems to have little influence on the heat and salt exchanged between layers (∼2 %–10 % of advected heat and salt). Therefore, the main point of our work is that most of the transformation of water properties along the strait is induced by the vertical advection of heat and salt and not by vertical mixing. A simple relationship between the net flux and the vertical transfers of water, heat and salt is also proposed. This relationship could be used for the fine-tuning of coarse-resolution model parameterizations in the strait.

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Madhiyanon, T., A. Techaprasan, and S. Soponronnarit. "Mathematical models based on heat transfer and coupled heat and mass transfers for rapid high temperature treatment in fluidized bed: Application for grain heat disinfestation." International Journal of Heat and Mass Transfer 49, no. 13-14 (July 2006): 2277–90. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2005.11.020.

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Supramono, Dijan, Adithya Fernando Sitorus, and Mohammad Nasikin. "Synergistic Effect on the Non-Oxygenated Fraction of Bio-Oil in Thermal Co-Pyrolysis of Biomass and Polypropylene at Low Heating Rate." Processes 8, no. 1 (January 2, 2020): 57. http://dx.doi.org/10.3390/pr8010057.

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Biomass pyrolysis and polypropylene (PP) pyrolysis in a stirred tank reactor exhibited different heat transfer phenomena whereby heat transfer in biomass pyrolysis was driven predominantly by heat radiation and PP pyrolysis by heat convection. Therefore, co-pyrolysis could exhibit be expected to display various heat transfer phenomena depending on the feed composition. The objective of the present work was to determine how heat transfer, which was affected by feed composition, affected the yield and composition of the non-polar fraction. Analysis of heat transfer phenomena was based on the existence of two regimes in the previous research in which in regime 1 (the range of PP composition in the feeds is 0–40%), mass ejection from biomass particles occurred without biomass particle swelling, while in regime 2 (the range of PP composition in the feeds is 40–100%), mass ejection was preceded by biomass particle swelling. The co-pyrolysis was carried out in a stirred tank reactor with heating rate of 5 °C/min until 500 °C and using N2 gas as carrier gas. Temperature measurement was applied to pyrolysis fluid at the lower part of the reactor and small biomass spheres of 6 mm diameter to simulate heat transfer to biomass particles. The results indicate that in regime 1 convective and radiative heat transfers sparingly occurred and synergistic effect on the yield of non-oxygenated phase increased with increasing convective heat transfer at increasing %PP in feed. On the other hand, in regime 2, convective heat transfer was predominant with decreasing synergistic effect at increasing %PP in feed. The optimum PP composition in feed to reach maximum synergistic effect was 50%. Non-oxygenated phase portion in the reactor leading to the wax formation acted as donor of methyl and hydrogen radicals in the removal of oxygen to improve synergistic effect. Non-oxygenated fraction of bio-oil contained mostly methyl comprising about 53% by mole fraction, while commercial diesel contained mostly methylene comprising about 59% by mole fraction

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Seini, Y. I., and O. D. Makinde. "MHD Boundary Layer Flow due to Exponential Stretching Surface with Radiation and Chemical Reaction." Mathematical Problems in Engineering 2013 (2013): 1–7. http://dx.doi.org/10.1155/2013/163614.

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The effects of radiation and first order homogeneous chemical reaction on hydromagnetic boundary layer flow of a viscous, steady, and incompressible fluid over an exponential stretching sheet have been investigated. The governing system of partial differential equations has been transformed into ordinary differential equations using similarity variables. The dimensionless system of differential equations was then solved numerically by the Runge-Kutta method. The skin-friction coefficient and the rate of heat and mass transfers are presented in tables whilst velocity, temperature, and concentration profiles are illustrated graphically for various varying parameter values. It was found that the rate of heat transfer at the surface decreases with increasing values of the transverse magnetic field parameter and the radiation parameter.

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Nicholls, Melville E., and Roger A. Pielke Sr. "On the role of thermal expansion and compression in large-scale atmospheric energy and mass transports." Atmospheric Chemistry and Physics 18, no. 21 (November 7, 2018): 15975–6003. http://dx.doi.org/10.5194/acp-18-15975-2018.

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Abstract. There are currently two views of how atmospheric total energy transport is accomplished. The traditional view considers total energy as a quantity that is transported in an advective-like manner by the wind. The other considers that thermal expansion and the resultant compression of the surrounding air causes a transport of total energy in a wave-like manner at the speed of sound. This latter view emerged as the result of detailed analysis of fully compressible mesoscale model simulations that demonstrated considerable transfer of internal and gravitational potential energy at the speed of sound by Lamb waves. In this study, results are presented of idealized experiments with a fully compressible model designed to examine the large-scale transfers of total energy and mass when local heat sources are prescribed. For simplicity a Cartesian grid was used, there was a horizontally homogeneous and motionless initial state, and the simulations did not include moisture. Three main experimental designs were employed. The first has a convective-storm-scale heat source and does not include the Coriolis force. The second experiment has a continent-scale heat source prescribed near the surface to represent surface heating and includes a constant Coriolis parameter. The third experiment has a cloud-cluster-scale heat source prescribed at the equator and includes a latitude-dependent Coriolis parameter. Results show considerable amounts of meridional total energy and mass transfer at the speed of sound. This suggests that the current theory of large-scale total energy transport is incomplete. It is noteworthy that comparison of simulations with and without thermally generated compression waves show that for a very large-scale heat source there are fairly small but nevertheless significant differences of the wind field. These results raise important questions related to the mass constraints when calculating meridional energy transports, the use of semi-implicit time differencing in large-scale global models, and the use of the term “heat transfer” for total energy transfer.

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Heinrich, S., M. Henneberg, M. Peglow, J. Drechsler, and L. Mörl. "Fluidized bed spray granulation: analysis of heat and mass transfers and dynamic particle populations." Brazilian Journal of Chemical Engineering 22, no. 2 (June 2005): 181–94. http://dx.doi.org/10.1590/s0104-66322005000200004.

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Zhang, Jing, Song Zhang, Guangyu Chen, Zhe Jia, Yifei Qu, and Ziyu Guo. "Laser micro-texture formation mechanism based on modified heat-mass transfers and hydrodynamic models." International Journal of Mechanical Sciences 230 (September 2022): 107528. http://dx.doi.org/10.1016/j.ijmecsci.2022.107528.

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Mechergui, Olfa, Xavier Chesneau, and Ali Hatem Laatar. "HEAT AND MASS TRANSFERS BY NATURAL CONVECTION DURING WATER EVAPORATION IN A VERTICAL CHANNEL." Computational Thermal Sciences: An International Journal 9, no. 5 (2017): 423–45. http://dx.doi.org/10.1615/computthermalscien.2017019798.

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