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Journal articles on the topic 'Mass boundary layer'

Author: Grafiati

Published: 2 June 2025

Last updated: 31 July 2025

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1

Ng, Chiu-On. "Mass transport in a two-layer wave boundary layer." Ocean Engineering 28, no. 10 (2001): 1393–411. http://dx.doi.org/10.1016/s0029-8018(00)00057-3.

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2

Ahlgrimm, Maike, and David A. Randall. "Diagnosing Monthly Mean Boundary Layer Properties from Reanalysis Data Using a Bulk Boundary Layer Model." Journal of the Atmospheric Sciences 63, no. 3 (2006): 998–1012. http://dx.doi.org/10.1175/jas3669.1.

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Abstract The mixed-layer approach to modeling the planetary boundary layer (PBL) is particularly well suited to inversion-topped PBLs, such as the stratocumulus-topped boundary layer found off the west coast of America in the subtropical Pacific Ocean at northern and southern latitudes. However, a strong temperature inversion near 850 hPa (the trade wind inversion) is not confined to the stratocumulus regimes, but has been observed over most parts of the subtropical–tropical Pacific Ocean. In this paper, the authors test the ability of a simple bulk boundary layer model (BBLM) to diagnose entr

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3

Wäsche, S., H. Horn, and D. C. Hempel. "Mass transfer phenomena in biofilm systems." Water Science and Technology 41, no. 4-5 (2000): 357–60. http://dx.doi.org/10.2166/wst.2000.0466.

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Mathematical models allow the simulation of microorganism growth and substrate transport in biofilm systems. Nevertheless there is still a lack of knowledge about the mass transfer of substrate in the boundary layer between biofilm and bulkphase. Several biofilms were cultivated under different substrate and hydrodynamic conditions in a biofilm tube reactor. Oxygen concentration profiles were measured with oxygen microelectrodes in the biofilm and in the boundary layer. The thickness of the concentration layer was found to depend on surface structure which depends on the substrate loading and

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4

Lucas, Khaoya Mukwabi, Mark Kimathi Dr., and Charles Muli Dr. "EFFECTS OF REYNOLDS NUMBER VARIATION ON HEAT AND MASS TRANSFER FOR MHD FLOW IN A CONCENTRATED PARABOLIC THERMAL SOLAR COLLECTOR." EFFECTS OF REYNOLDS NUMBER VARIATION ON HEAT AND MASS TRANSFER FOR MHD FLOW IN A CONCENTRATED PARABOLIC THERMAL SOLAR COLLECTOR 10, no. 1 (2023): 38–51. https://doi.org/10.5281/zenodo.7805386.

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<strong>Abstract:</strong> The paper analyzes the effects of the Reynolds number variation on mixed convective heat and mass transfer over a parabolic surface under a radial magnetic field cutting perpendicular along the fluid flow in presence of a constant radiation heat source. The governing partial differential equations are transformed into a system of ordinary differential equation using non-dimensional numbers. The resulting system of ordinary differential equations together with the boundary equations are then solved numerically by finite difference method and simulated using MATLAB to

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5

Donovan, John F., Eric F. Spina, and Alexander J. Smits. "The structure of a supersonic turbulent boundary layer subjected to concave surface curvature." Journal of Fluid Mechanics 259 (January 25, 1994): 1–24. http://dx.doi.org/10.1017/s0022112094000017.

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This paper reports an experimental investigation of the instantaneous structure of a supersonic turbulent boundary layer (M= 2.86,Reθ= 82000) over a short region of longitudinal concave surface curvature. The radius of curvature was 12 initial boundary-layer thicknesses and the turning angle was 16°. Severe distortion of the boundary layer occurred, as evidenced by an alteration of the mean velocity profiles and an increase in wall shear stress of 125%. The large-scale organized motions in the boundary layer were significantly altered as illustrated by changes in the character of the mass flux

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6

Beare, Robert J., and Michael J. P. Cullen. "A Simple Model of a Balanced Boundary Layer Coupled to a Large-Scale Convective Circulation." Journal of the Atmospheric Sciences 76, no. 3 (2019): 837–49. http://dx.doi.org/10.1175/jas-d-18-0189.1.

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Abstract Many simple models of large-scale tropical circulations do not include a frictional boundary layer. A simple model is presented where the convective circulation is coupled to the boundary layer convergence. In the free troposphere, convection and boundary layer heating try to relax to a moist adiabat from the local sea surface temperature with a time scale τc, but other processes act to maintain a weak temperature gradient. There is a mass balance between radiatively driven subsidence and the large-scale convective mass flux. For a prescribed Gaussian surface temperature, the model pr

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7

Wang, Ping, Xue Shan Liu, Ying Jun Lv, Bin Xie, and Guo Qing Liu. "Numerical Investigation of Aero Engine Afterburner Fuel Manifold." Applied Mechanics and Materials 401-403 (September 2013): 210–13. http://dx.doi.org/10.4028/www.scientific.net/amm.401-403.210.

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In this paper, Method of CFD is used to simulate afterburner fuel manifold for aero engine, and investigate the relationship between the boundary layer of nozzle hole and mass flow. At the same time the numerical simulation of permitted maximum and minimum of nozzle hole was carried out and mass flow for calculation was also compared with the design value. The calculation results show the effect of machining quality of nozzle holes on mass flow of afterburner fuel manifold, for which the diameter of nozzle hole is so small that the effects of machining precision and boundary layer thickness on

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8

Hubbard, S., and N. Riley. "Boundary-layer control by heat and mass transfer." International Journal of Heat and Mass Transfer 38, no. 17 (1995): 3209–17. http://dx.doi.org/10.1016/0017-9310(95)00070-p.

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9

Li, Xiao Hua, and Dao Guang Lin. "Study of the Cooling Wall Boundary Layer with Underfloor Supply Room." Advanced Materials Research 287-290 (July 2011): 2575–78. http://dx.doi.org/10.4028/www.scientific.net/amr.287-290.2575.

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Based on the underground supply room properties and the boundary layer theory, this paper derived the temperature calculation formula of the laminar boundary layer and turbulent boundary layer, respectively; then discussed the mass flow calculation formula of the boundary layer; at the end experiment indicated the boundary layer definitely exits between the main region and the outside structure, whose temperature is between the air temperature of the main region and the air temperature of the wall. It validated that the theory analysis is correct.

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10

Angevine, Wayne M., Hongli Jiang, and Thorsten Mauritsen. "Performance of an Eddy Diffusivity–Mass Flux Scheme for Shallow Cumulus Boundary Layers." Monthly Weather Review 138, no. 7 (2010): 2895–912. http://dx.doi.org/10.1175/2010mwr3142.1.

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Abstract Comparisons between single-column (SCM) simulations with the total energy–mass flux boundary layer scheme (TEMF) and large-eddy simulations (LES) are shown for four cases from the Gulf of Mexico Atmospheric Composition and Climate Study (GoMACCS) 2006 field experiment in the vicinity of Houston, Texas. The SCM simulations were run with initial soundings and surface forcing identical to those in the LES, providing a clean comparison with the boundary layer scheme isolated from any other influences. Good agreement is found in the simulated vertical transport and resulting moisture profi

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11

Alsaedi, Ahmed, Zahid Iqbal, Meraj Mustafa, and Tasawar Hayat. "Exact Solutions for the Magnetohydrodynamic Flow of a Jeffrey Fluid with Convective Boundary Conditions and Chemical Reaction." Zeitschrift für Naturforschung A 67, no. 8-9 (2012): 517–24. http://dx.doi.org/10.5560/zna.2012-0054.

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The two-dimensional magnetohydrodynamic (MHD) flow of a Jeffrey fluid is investigated in this paper. The characteristics of heat and mass transfer with chemical reaction have also been analyzed. Convective boundary conditions have been invoked for the thermal boundary layer problem. Exact similarity solutions for flow, temperature, and concentration are derived. Interpretation to the embedded parameters is assigned through graphical results for dimensionless velocity, temperature, concentration, skin friction coefficient, and surface heat and mass transfer. The results indicate an increase in

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12

Fletcher, Jennifer K., and Christopher S. Bretherton. "Evaluating Boundary Layer–Based Mass Flux Closures Using Cloud-Resolving Model Simulations of Deep Convection." Journal of the Atmospheric Sciences 67, no. 7 (2010): 2212–25. http://dx.doi.org/10.1175/2010jas3328.1.

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Abstract High-resolution three-dimensional cloud resolving model simulations of deep cumulus convection under a wide range of large-scale forcings are used to evaluate a mass flux closure based on boundary layer convective inhibition (CIN) that has previously been applied in parameterizations of shallow cumulus convection. With minor modifications, it is also found to perform well for deep oceanic and continental cumulus convection, and it matches simulated cloud-base mass flux much better than a closure based only on the boundary layer convective velocity scale. CIN closure maintains an impor

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13

Delgado, João M. P. Q., and M. Vázquez da Silva. "Mass Transfer around a Sphere Buried in a Packed Bed." Defect and Diffusion Forum 353 (May 2014): 306–10. http://dx.doi.org/10.4028/www.scientific.net/ddf.353.306.

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The transport phenomenon of mass transfers between a moving fluid and a reacting sphere buried in a packed bed, with “uniform velocity”, was analysed numerically, for solute transport by both advection and diffusion to obtain the concentration field and, from it, the dimensionless concentration boundary layer thickness, , for , and . The bed of inert particles is taken to have uniform voidage. For this purpose, numerical solutions of the partial differential equations describing mass concentration of the solute were undertaken to obtain the concentration boundary layer thickness as a function

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14

Siebesma, A. Pier, Pedro M. M. Soares, and João Teixeira. "A Combined Eddy-Diffusivity Mass-Flux Approach for the Convective Boundary Layer." Journal of the Atmospheric Sciences 64, no. 4 (2007): 1230–48. http://dx.doi.org/10.1175/jas3888.1.

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Abstract A better conceptual understanding and more realistic parameterizations of convective boundary layers in climate and weather prediction models have been major challenges in meteorological research. In particular, parameterizations of the dry convective boundary layer, in spite of the absence of water phase-changes and its consequent simplicity as compared to moist convection, typically suffer from problems in attempting to represent realistically the boundary layer growth and what is often referred to as countergradient fluxes. The eddy-diffusivity (ED) approach has been relatively suc

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15

Huang, Hsin-Yuan, Alex Hall, and Joao Teixeira. "Evaluation of the WRF PBL Parameterizations for Marine Boundary Layer Clouds: Cumulus and Stratocumulus." Monthly Weather Review 141, no. 7 (2013): 2265–71. http://dx.doi.org/10.1175/mwr-d-12-00292.1.

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Abstract The performance of five boundary layer parameterizations in the Weather Research and Forecasting Model is examined for marine boundary layer cloud regions running in single-column mode. Most parameterizations show a poor agreement of the vertical boundary layer structure when compared with large-eddy simulation models. These comparisons against large-eddy simulation show that a parameterization based on the eddy-diffusivity/mass-flux approach provides a better performance. The results also illustrate the key role of boundary layer parameterizations in model performance.

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16

Gaponov, Sergey, and Aleksandr Semenov. "Influence The Direction Of Blowing Gas Through A Porous Surface On The Stability Of The Supersonic Boundary Layer." Siberian Journal of Physics 10, no. 2 (2015): 18–26. http://dx.doi.org/10.54362/1818-7919-2015-10-2-18-26.

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In the paper the influence of the gas blowing direction through a porous surface on the supersonic boundary layer stability is investigated theoretically, using the classical method of elementary waves and the evolutionary method at Mach number M = 2. It was found that with decreasing of the gas injection angle to the plane plate the boundary layer stability was improved and the tangential blowing effect on the boundary layer stability is little in a comparison with the case of a boundary layer without mass exchange.

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17

Lucas, Khaoya Mukwabi, Mark Kimathi Dr., and Charles Muli Dr. "EFFECTS OF BROWNIAN MOTION AND THERMOPHORESIS VARIATION ON MHD NANOFLUID FLOW IN A CONCENTRATED PARABOLIC THERMAL SOLAR COLLECTOR." International Journal of Novel Research in Physics Chemistry & Mathematics 10, no. 1 (2023): 25–37. https://doi.org/10.5281/zenodo.7804696.

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<strong>Abstract:</strong> This research paper investigates the effects of Thermophoresis and Brownian motion parameter variation on heat and mass transfer on MHD nanofluid flow in a parabolic thermal solar collector. The effect of laminar flow which is occasioned by a variation in the Brownian motion and Thermophoresis parameter over a parabolic shaped photovoltaic surface has been investigated numerically. The model used for the nanofluid flow incorporates the effects of Brownian motion and thermophoresis parameter variation with thermal variation due to solar radiation in the presence of an

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18

Hsu, Cheng-Hsing, Te-Hui Tsai, Ching-Chuan Chang, and Wen-Han Huang. "A boundary layer flow analysis of a magnetohydrodynamic fluid over a shrinking sheet." Advances in Mechanical Engineering 11, no. 3 (2019): 168781401983506. http://dx.doi.org/10.1177/1687814019835069.

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A steady-state boundary layer flow analysis of a non-Newtonian magnetic fluid over a shrinking sheet was studied. The boundary layer thickness and the velocity distribution in the layer were studied under the conditions of a uniform magnetic field normal to the shrinking sheet and/or a vertical uniform mass suction across the sheet. The similarity transformation method was used to transform the governing partial differential equations to ordinary differential equations. The shooting method with Newton’s algorithm and Runge–Kutta integration method were used to obtain the solutions of the equat

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19

Witek, Marcin L., Joao Teixeira, and Georgios Matheou. "An Integrated TKE-Based Eddy Diffusivity/Mass Flux Boundary Layer Closure for the Dry Convective Boundary Layer." Journal of the Atmospheric Sciences 68, no. 7 (2011): 1526–40. http://dx.doi.org/10.1175/2011jas3548.1.

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Abstract This study presents a new approach to the eddy diffusivity/mass flux (EDMF) framework for the modeling of convective boundary layers. At the root of EDMF lies a decomposition of turbulent transport mechanisms into strong ascending updrafts and smaller-scale turbulent motions. The turbulent fluxes can be therefore described using two conventional approaches: mass flux (MF) for the organized thermals and eddy diffusivity (ED) for the remaining turbulent field. Since the intensities of both MF and ED transports depend on the kinetic energy of the turbulent motions, it seems reasonable to

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20

Wen, Jiangang, and Philip L. F. Liu. "Mass transport of interfacial waves in a two-layer fluid system." Journal of Fluid Mechanics 297 (August 25, 1995): 231–54. http://dx.doi.org/10.1017/s0022112095003077.

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Effects of viscous damping on mass transport velocity in a two-layer fluid system are studied. A temporally decaying small-amplitude interfacial wave is assumed to propagate in the fluids. The establishment and the decay of mean motions are considered as an initial-boundary-value problem. This transient problem is solved by using a Laplace transform with a numerical inversion. It is found that thin ‘second boundary layers’ are formed adjacent to the interfacial Stokes boundary layers. The thickness of these second boundary layers is of O(ε1/2) in the non-dimensional form, where ε is the dimens

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21

Ma Shuopeng, Zhu Haiyi, and Han Yufeng. "Effects of wall-injected gas properties on hypersonic boundary layer instability." Acta Physica Sinica 74, no. 17 (2025): 0. https://doi.org/10.7498/aps.74.20250385.

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Active mass injection serves as an effective thermal protection technique by significantly reducing wall heat flux. However, it inherently alters boundary layer stability characteristics, leading to substantial impacts on the laminar-to-turbulent transition process. Crucially, the underlying mechanisms governing how different injected gases modulate flow stability remain unclear. To systematically analyze the effects of different gas injections on flow stability, this study investigates gas-specific mass injection effects by employing a multicomponent Navier-Stokes solver to compute flow field

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22

Kleis, Stanley J., and Ivan Rivera-Solorio. "Time Scales for Unsteady Mass Transfer From a Sphere at Low-Finite Reynolds Numbers." Journal of Heat Transfer 125, no. 4 (2003): 716–23. http://dx.doi.org/10.1115/1.1576813.

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The problem of unsteady mass transfer from a sphere that impulsively moves from rest to a finite velocity in a non-uniform concentration distribution is studied. A range of low Reynolds numbers (Re<1) and moderate Peclet numbers (Pe ranges from 5.6 to 300) is investigated (typical of the parameters encountered in anchorage dependent cell cultures in micro gravity). Using time scales, the effects of flow field development, concentration boundary layer development and free stream concentration variation are investigated. For the range of parameters considered, the development of the flow fiel

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23

Wang, Yaping, Christopher A. Davis, and Yongjie Huang. "Dynamics of Lower-Tropospheric Vorticity in Idealized Simulations of Tropical Cyclone Formation." Journal of the Atmospheric Sciences 76, no. 3 (2019): 707–27. http://dx.doi.org/10.1175/jas-d-18-0219.1.

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Abstract Idealized simulations are conducted using the Cloud Model version 1 (CM1) to explore the mechanism of tropical cyclone (TC) genesis from a preexisting midtropospheric vortex that forms in radiative–convective equilibrium. With lower-tropospheric air approaching near saturation during TC genesis, convective cells become stronger, along with the intensifying updrafts and downdrafts and the larger area coverage of updrafts relative to downdrafts. Consequently, the low-level vertical mass flux increases, inducing vorticity amplification above the boundary layer. Of interest is that while

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24

Vittori, G., and P. Blondeaux. "Mass transport under sea waves propagating over a rippled bed." Journal of Fluid Mechanics 314 (May 10, 1996): 247–65. http://dx.doi.org/10.1017/s0022112096000304.

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Mass transport under a progressive sea wave propagating over a rippled bed is investigated. Wave amplitudes a* of the same order of magnitude as that of the boundary layer thickness δ* and of the ripple wavelength l* are considered. All the above quantities are assumed to be much smaller than the wavelength L* of the sea wave and much larger than the amplitude 2ε* of the ripples. The analysis is carried out up to the second order in the wave slope a*/L* and in the parameter ε*/δ* which is a measure of ripple steepness. Because of these assumptions, the slow damping of wave amplitude in the dir

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25

Rappin, Eric D., David S. Nolan, and Sharanya J. Majumdar. "A Highly Configurable Vortex Initialization Method for Tropical Cyclones." Monthly Weather Review 141, no. 10 (2013): 3556–75. http://dx.doi.org/10.1175/mwr-d-12-00266.1.

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Abstract A highly configurable vortex initialization methodology has been constructed in order to permit manipulation of the initial vortex structure in numerical models of tropical cyclones. By using distinct specifications of the flow in the boundary layer and free atmosphere, an array of parameters is available to modify the structure. A nonlinear similarity model that solves the steady-state, height-dependent equations for a neutrally stratified, axisymmetric vortex is solved for the boundary layer flow. Above the boundary layer, a steady-state, moist-neutral, hydrostatic and gradient wind

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26

Zhang, Tian C., and Paul L. Bishop. "Experimental determination of the dissolved oxygen boundary layer and mass transfer resistance near the fluid-biofilm interface." Water Science and Technology 30, no. 11 (1994): 47–58. http://dx.doi.org/10.2166/wst.1994.0545.

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The thickness of the dissolved oxygen (DO) concentration boundary layer and the external mass transfer in a biofilm system were investigated using a microelectrode technique. Theoretical analysis was conducted to elucidate the mechanisms of the technique and to interpret the experimental measurements. The measured thicknesses of dissolved oxygen (DO) concentration boundary layers under different conditions demonstrated directly the effect of several factors on external mass transfer resistance. The experimental results indicated that (a) increasing substrate loading rate, (b) increasing fluid

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27

Tushavina, O. V., and M. S. Egorova. "Problems of heat and mass transfer in chemically reacting boundary layers on blunted bodies." Uchenye Zapiski Kazanskogo Universiteta. Seriya Fiziko-Matematicheskie Nauki 165, no. 3 (2024): 294–306. http://dx.doi.org/10.26907/2541-7746.2023.3.294-306.

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This article considers a nonlinear system of partial differential equations describing the boundary layer. Such a system is commonly solved by numerical methods. Here, the Dorodnitsyn–Lees variables were used to carry out an analysis and derive the formulas for calculating the body temperatures and the heat fluxes to the body generated by the reacting compressible gradient boundary layer.

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28

Leukauf, Daniel, Alexander Gohm, and Mathias W. Rotach. "Quantifying horizontal and vertical tracer mass fluxes in an idealized valley during daytime." Atmospheric Chemistry and Physics 16, no. 20 (2016): 13049–66. http://dx.doi.org/10.5194/acp-16-13049-2016.

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Abstract. The transport and mixing of pollution during the daytime evolution of a valley boundary layer is studied in an idealized way. The goal is to quantify horizontal and vertical tracer mass fluxes between four different valley volumes: the convective boundary layer, the slope wind layer, the stable core, and the atmosphere above the valley. For this purpose, large eddy simulations (LES) are conducted with the Weather Research and Forecasting (WRF) model for a quasi-two-dimensional valley. The valley geometry consists of two slopes with constant slope angle and is homogeneous in the along

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29

Estruch-Samper, David, and Gaurav Chandola. "Separated shear layer effect on shock-wave/turbulent-boundary-layer interaction unsteadiness." Journal of Fluid Mechanics 848 (June 4, 2018): 154–92. http://dx.doi.org/10.1017/jfm.2018.350.

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This paper presents an experimental study on shock-wave/turbulent-boundary-layer interaction unsteadiness and delves specifically into the shear layer’s role. A range of axisymmetric step-induced interactions is investigated and the scale of separation is altered by over an order of magnitude – mass in the recirculation by two orders – while subjected to constant separation-shock strength. The effect of the separated shear layer on interaction unsteadiness is thus isolated and its kinematics are characterised. Results point at a mechanism whereby the depletion of separated flow is dictated by

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30

Zhong, Wei, and Cong Yu. "The Critical Core Mass of Rotating Planets." Astrophysical Journal 926, no. 1 (2022): 43. http://dx.doi.org/10.3847/1538-4357/ac4261.

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Abstract The gravitational harmonics measured from the Juno and Cassini spacecraft help us specify the internal structure and chemical elements of Jupiter and Saturn, respectively. However, we still do not know much about the impact of rotation on the planetary internal structure as well as on their formation. The centrifugal force induced by the rotation deforms the planetary shape and partially counteracts the gravitational force. Thus, rotation will affect the critical core mass of the exoplanet. Once the atmospheric mass becomes comparable to the critical core mass, the planet will enter t

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Cameron, Amanda P., Sofia B. Davey, Caitlin L. Callahan, and Scott W. Donne. "Communication—Demonstrating the Role of Mass Transport in Double Layer Formation." Journal of The Electrochemical Society 169, no. 2 (2022): 020578. http://dx.doi.org/10.1149/1945-7111/ac55ca.

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Herein we present insight into the structure and behaviour of the electrified interface between a planar non-porous glassy carbon electrode and an aqueous solution of 0.5 M Na2SO4. Specifically, a glassy carbon rotating disk electrode was used to show correspondence between increasing rotation rates, decreasing boundary layer thicknesses, and decreasing interfacial capacitance. The implication is that electrolyte counter charge is being dissipated by convective flow outside of the macroscopically thick boundary layer, indicating that electrolyte counter-charge extends substantially into the el

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McGrath-Spangler, E. L., A. S. Denning, K. D. Corbin, and I. T. Baker. "Implementation of a boundary layer heat flux parameterization into the Regional Atmospheric Modeling System (RAMS)." Atmospheric Chemistry and Physics Discussions 8, no. 4 (2008): 14311–46. http://dx.doi.org/10.5194/acpd-8-14311-2008.

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Abstract. The response of atmospheric carbon dioxide to a given amount of surface flux is inversely proportional to the depth of the boundary layer. Overshooting thermals that entrain free tropospheric air down into the boundary layer modify the characteristics and depth of the lower layer through the insertion of energy and mass. This alters the surface energy budget by changing the Bowen ratio and thereby altering the vegetative response and the surface boundary conditions. Although overshooting thermals are important in the physical world, their effects are unresolved in most regional model

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Abd Elazem, Nader Y. "Numerical results for influence the flow of MHD nanofluids on heat and mass transfer past a stretched surface." Nonlinear Engineering 10, no. 1 (2021): 28–38. http://dx.doi.org/10.1515/nleng-2021-0003.

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Abstract Due to its significant applications in physics, chemistry, and engineering, some interest has been given in recent years to research the boundary layer flow of magnetohydrodynamic nanofluids. The numerical results were analyzed for temperature profile, concentration profile, reduced number of Nusselt and reduced number of Sherwood. It has also been shown that the magnetic field, the Eckert number, and the thermophoresis parameter boost the temperature field and raise the thermal boundary layer thickness while the Prandtl number reduces the temperature field at high values and lowers t

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Drake, Henri F., Raffaele Ferrari, and Jörn Callies. "Abyssal Circulation Driven by Near-Boundary Mixing: Water Mass Transformations and Interior Stratification." Journal of Physical Oceanography 50, no. 8 (2020): 2203–26. http://dx.doi.org/10.1175/jpo-d-19-0313.1.

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AbstractThe emerging view of the abyssal circulation is that it is associated with bottom-enhanced mixing, which results in downwelling in the stratified ocean interior and upwelling in a bottom boundary layer along the insulating and sloping seafloor. In the limit of slowly varying vertical stratification and topography, however, boundary layer theory predicts that these upslope and downslope flows largely compensate, such that net water mass transformations along the slope are vanishingly small. Using a planetary geostrophic circulation model that resolves both the boundary layer dynamics an

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35

Abdel-Wahed, Mohamed, and Essam El-Said. "Magnetohydrodynamic flow and heat transfer over a moving cylinder in a nanofluid under convective boundary conditions and heat generation." Thermal Science 23, no. 6 Part B (2019): 3785–96. http://dx.doi.org/10.2298/tsci170911279a.

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In this paper, the effect of convective boundary conditions, heat generation, Brownian motion, and thermophoresis on heat transfer characteristics of a moving cylinder embedded into cooling medium consists of water with nanoparticles are studied. The governing boundary-layer equations transformed to ODE using similarity transformation method and then solved analytically using optimal homotopy asymptotic method for the general case. The velocity, temperature, and concentration profiles within the boundary-layer plotted and discussed in details for various values of the different parameters. Mor

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36

Gentine, Pierre, Alan K. Betts, Benjamin R. Lintner, Kirsten L. Findell, Chiel C. van Heerwaarden, and Fabio D’Andrea. "A Probabilistic Bulk Model of Coupled Mixed Layer and Convection. Part II: Shallow Convection Case." Journal of the Atmospheric Sciences 70, no. 6 (2013): 1557–76. http://dx.doi.org/10.1175/jas-d-12-0146.1.

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Abstract The probabilistic bulk convection model (PBCM) developed in a companion paper is here extended to shallow nonprecipitating convection. The PBCM unifies the clear-sky and shallow convection boundary layer regimes by obtaining mixed-layer growth, cloud fraction, and convective inhibition from a single parameterization based on physical principles. The evolution of the shallow convection PBCM is based on the statistical distribution of the surface thermodynamic state of convective plumes. The entrainment velocity of the mixed layer is related to the mass flux of the updrafts overshooting

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KONDO, Masaya, Teppei TANAKA, Takahiro ITO, and Yoshiyuki TSUJI. "J057045 Comparison of effect of concentration boundary layer on mass." Proceedings of Mechanical Engineering Congress, Japan 2013 (2013): _J057045–1—_J057045–2. http://dx.doi.org/10.1299/jsmemecj.2013._j057045-1.

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38

Nemati, H., H. Bararnia, F. Noori, A. Barari, M. Famouri, and V. Rouhani. "Boundary Layer Flows in Porous Media with Lateral Mass Flux." Energy Sources, Part A: Recovery, Utilization, and Environmental Effects 37, no. 9 (2015): 919–29. http://dx.doi.org/10.1080/15567036.2011.596909.

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Tan, Dapeng, Lin Li, Zichao Yin, Daifeng Li, Yinlong Zhu, and Shuai Zheng. "Ekman boundary layer mass transfer mechanism of free sink vortex." International Journal of Heat and Mass Transfer 150 (April 2020): 119250. http://dx.doi.org/10.1016/j.ijheatmasstransfer.2019.119250.

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COOPER, D., M. LECLERC, J. ARCHULETA, et al. "Mass exchange in the stable boundary layer by coherent structures." Agricultural and Forest Meteorology 136, no. 3-4 (2006): 114–31. http://dx.doi.org/10.1016/j.agrformet.2004.12.012.

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Setiawan, Ridwan, Pesila Ratnayake, and Jie Bao. "Mass/Heat Transfer Enhancement Model for Boundary Layer Control Analysis." IFAC Proceedings Volumes 47, no. 3 (2014): 7025–30. http://dx.doi.org/10.3182/20140824-6-za-1003.02073.

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Liu, Sean X., Ming Peng, and Leland Vane. "CFD modeling of pervaporative mass transfer in the boundary layer." Chemical Engineering Science 59, no. 24 (2004): 5853–57. http://dx.doi.org/10.1016/j.ces.2004.07.001.

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Neggers, Roel A. J., Martin Köhler, and Anton C. M. Beljaars. "A Dual Mass Flux Framework for Boundary Layer Convection. Part I: Transport." Journal of the Atmospheric Sciences 66, no. 6 (2009): 1465–87. http://dx.doi.org/10.1175/2008jas2635.1.

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Abstract This study considers the question of what is the least complex bulk mass flux framework that can still conceptually reproduce the smoothly varying coupling between the shallow convective cloud layer and the subcloud mixed layer. To this end, the model complexity of the classic single bulk mass flux scheme is enhanced. Inspired by recent large-eddy simulation results, the authors argue that two relatively minor but key conceptual modifications are already sufficient to achieve this goal: (i) retaining a dry transporting updraft in the moist limit and (ii) applying continuous updraft ar

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Misra, Ashok, Soumyendra Mishra, Abdul Kaffoor Abdul Hakeem, and Manoj Kumar Nayak. "Three Dimensional Magnetohydrodynamic Stretched Flow of Cross Nanofluids." Modelling, Measurement and Control B 89, no. 1-4 (2020): 28–35. http://dx.doi.org/10.18280/mmc_b.891-405.

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The purpose of the present study is to analyze the flow, heat and mass transfer characteristics in the three dimensional magnetohydrodynamic stretched flow of Cross nanofluids. In the present study, Brownian movement, thermophoresis, thermal and solute convective boundary conditions are considered. With boundary layer approximation and self-similarity transformations, the non dimensional nonlinear governing equations are solved via shooting iteration technique together with 4th order Runge-Kutta integration scheme. The impact of developed physical parameters on velocity, temperature, concentra

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ER-RAKI, Mohammed, Safae HASNAOUI, Mohammed HASNAOUI, Abderrahim BAZGAOU, and Mohamed BOURICH. "Analytical, numerical and scale analysis study of thermal diffusion effect on free convection boundary layer flows in a slender porous layer." Proceedings of the Romanian Academy, Series A: Mathematics, Physics, Technical Sciences, Information Science 24, no. 4 (2023): 349–59. http://dx.doi.org/10.59277/pra-ser.a.24.4.07.

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This paper reports an analytical, numerical and scale analysis study of free convective heat and mass transfer flows coupled with thermal diffusion effect in a slender vertical porous cavity subjected to cooperating lateral temperature and concentration gradients. The top and bottom walls of the cavity are assumed to be adiabatic and impermeable to mass transfer. This study aims to analyze the different hydrodynamic, thermal and solutal behaviors developed in laminar boundary layer flow regime reached at high Rayleigh numbers. Based on the parallel flow approximation, an analytical solution of

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GARCÍA-YBARRA, PEDRO L., and JOSE L. CASTILLO. "Mass transfer dominated by thermal diffusion in laminar boundary layers." Journal of Fluid Mechanics 336 (April 10, 1997): 379–409. http://dx.doi.org/10.1017/s0022112096004661.

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The concentration distribution of massive dilute species (e.g. aerosols, heavy vapours, etc.) carried in a gas stream in non-isothermal boundary layers is studied in the large-Schmidt-number limit, Sc[Gt ]1, including the cross-mass-transport by thermal diffusion (Ludwig–Soret effect). In self-similar laminar boundary layers, the mass fraction distribution of the dilute species is governed by a second-order ordinary differential equation whose solution becomes a singular perturbation problem when Sc[Gt ]1. Depending on the sign of the temperature gradient, the solutions exhibit different quali

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SELLAMI, Karima, M’barek FEDDAOUI, Nabila LABSI, M’hand OUBELLA, and Youb Khaled BENKAHLA. "Numerical Study of Heat and Mass Transfer during the Evaporative Drying of Porous Media." MATEC Web of Conferences 307 (2020): 01050. http://dx.doi.org/10.1051/matecconf/202030701050.

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The paper deals with numerical study of drying process of porous media of sand during the evaporation of a liquid saturated porous layer within parallel vertical channel. The liquid and air streams are modeled as two coupled laminar boundary layers incorporating non-Darcian models of the inertia and boundary effects. The governing equations and the associated boundary conditions are discretized by means of the finite volume method implemented on a staggered mesh and the velocity-pressure coupling is processed by the SIMPLER algorithm. The influences of the inlet mass flow of the drying gas, po

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Alsaedi, A., F. E. Alsaadi, S. Ali, and T. Hayat. "Stagnation Point Flow of Burgers' Fluid and Mass Transfer with Chemical Reaction and Porosity." Journal of Mechanics 29, no. 3 (2013): 453–60. http://dx.doi.org/10.1017/jmech.2013.20.

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AbstractThis paper studies the influence of mass transfer in the magnetohydrodynamic (MHD) boundary layer stagnation point flow of Burgers' fluid over a shrinking sheet. Analysis has been carried out in the presence of first order chemical reaction. The two-dimensional flow equations are modeled and then simplified using boundary layer approach. Similarity variables are used to transform the partial differential equations into nonlinear ordinary differential equation. The resulting system is computed using homotopy analysis method (HAM). It is noted that retardation time in Burgers' fluid enha

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Basir, Md Faisal Md, Mohammed Jashim Uddin, and Ahmad Izani Md Ismail. "Unsteady three-dimensional stagnation point magnetohydrodynamic flow of bionanofluid with variable properties." Proceedings of the Institution of Mechanical Engineers, Part N: Journal of Nanomaterials, Nanoengineering and Nanosystems 232, no. 4 (2018): 123–34. http://dx.doi.org/10.1177/2397791418817844.

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Unsteady three-dimensional laminar stagnation point forced convective boundary layer magnetohydrodynamic flow of a bionanofluid with variable transport properties is studied theoretically and numerically. Thermal convective and zero mass flux boundary conditions are incorporated in this study. The transport properties are assumed to be a function of nanoparticle volume fraction to get physically realistic results. The dimensional boundary layer equations along with the coupled boundary conditions are transformed via similarity transformations into a system of ordinary differential equations. T

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Rio, Catherine, and Frédéric Hourdin. "A Thermal Plume Model for the Convective Boundary Layer: Representation of Cumulus Clouds." Journal of the Atmospheric Sciences 65, no. 2 (2008): 407–25. http://dx.doi.org/10.1175/2007jas2256.1.

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Abstract The “thermal plume model,” a mass-flux scheme combined with a classical diffusive approach, originally developed to represent turbulent transport in the dry convective boundary layer, is extended here to the representation of cloud processes. The modified parameterization is validated in a 1D configuration against results of large eddy simulations (LES), as well as in a 3D configuration against in situ measurements, for a series of cases of dry and cloudy convective boundary layers. Accounting for coherent structures of the mixed layer with the mass-flux scheme improves the representa

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