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Articles de revues sur le sujet « General Dufour »

Auteur : Grafiati

Publié le 25 juillet 2024

Mis à jour le 31 juillet 2025

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1

Durojaye, M. O., J. A. Kazeem, F. O. Ogunfiditimi, and I. J. Ajie. "Method of Lines Analysis of Soret and Dufour Effects on an Unsteady Heat and Mass Transfer MHD Natural Convection Couette Flow." Physical Science International Journal 27, no. 2 (2023): 10–18. http://dx.doi.org/10.9734/psij/2023/v27i2780.

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This study examines the numerical solutions of an unsteady natural convection Couette flow of a viscous, incompressible and electrically conducting fluid between the two vertical parallel plates in the presence of thermal radiation, Soret and Dufour. The fundamental dimensionless governing partial differential equations for the impulsive movement of the plate are solved by method of lines (MOL). The numerical simulations for the effects of Soret and Dufour on the velocity profile, the temperature profile and the concentration profile of the flow are shown graphically. The analysis indicates th

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2

Kavitha, S., and A. Selvaraj. "Rotation and Dufour Impact on Unsteady Flow Past a Parabolic Accelerated Vertical Plate with Uniform Temperature and Mass Diffusion." Indian Journal Of Science And Technology 17, no. 24 (2024): 2482–93. http://dx.doi.org/10.17485/ijst/v17i24.1422.

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Objective : Fluid dynamics and heat transfer theory examine the Dufour phenomenon and the rotational influence of unstable parabolic flow across an accelerating infinite vertical plate. This scenario involves several parameters, including the "mass Grashof number (Gr), thermal Grashof number (Gc), Prandtl number (Pr), Hartmann number (Ha), Schmidt number (Sc), Dufour number (Dc), and acceleration parameter". Method : We have applied the Laplace transform method to the resulting PDE. This method converts the equations to algebraic form, making it easier to solve for velocity, temperature, and c

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S, Kavitha, and Selvaraj A. "Rotation and Dufour Impact on Unsteady Flow Past a Parabolic Accelerated Vertical Plate with Uniform Temperature and Mass Diffusion." Indian Journal of Science and Technology 17, no. 24 (2024): 2482–93. https://doi.org/10.17485/IJST/v17i24.1422.

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Abstract <strong>Objective :</strong> Fluid dynamics and heat transfer theory examine the Dufour phenomenon and the rotational influence of unstable parabolic flow across an accelerating infinite vertical plate. This scenario involves several parameters, including the "mass Grashof number (Gr), thermal Grashof number (Gc), Prandtl number (Pr), Hartmann number (Ha), Schmidt number (Sc), Dufour number (Dc), and acceleration parameter". <strong>Method :</strong> We have applied the Laplace transform method to the resulting PDE. This method converts the equations to algebraic form,

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Jha, Basant K., and Yusuf Y. Gambo. "Transient natural convention heat and mass transfer flow in a vertical channel in the presence of Soret and Dufour effects: An analytical approach." International Journal of Modern Physics C 31, no. 02 (2020): 2050032. http://dx.doi.org/10.1142/s0129183120500321.

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This paper presents an analytical solution for transient natural convection heat and mass transfer flow in a vertical channel with Soret and Dufour effects. Due to the presence of these two effects, energy and concentration equations are coupled. The dimensionless governing equations for momentum, energy and concentration are first decoupled using perturbation method and then solved using Laplace Transform Technique (LTT) under relevant initial and boundary conditions. The expressions for temperature, concentration, velocity, rate of heat transfer, rate of mass transfer and skin-friction are o

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Siti Suzilliana Putri Mohamed Isa, Hazirah Mohd Azmi, Nanthini A/P Balakrishnan, Norihan Md. Arifin, and Haliza Rosali. "Soret-Dufour Effects on Heat and Mass Transfer of Newtonian Fluid Flow over the Inclined Sheet and Magnetic Field." Journal of Advanced Research in Numerical Heat Transfer 14, no. 1 (2023): 39–48. http://dx.doi.org/10.37934/arnht.14.1.3948.

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Newtonian fluid is ideal for lubrication purposes because the viscosity of this fluid remains as a function of the shear. Besides, the heat and mass transfer are an important study area in fluid dynamics due to its vast applications in industrial processes. The heat-mass transfer can be defined as the Soret and Dufour effect, which implemented in many industrial applications such as in chemical engineering and geosciences field. In addition, the fluid flow over an extending/compressing sheet has significant industrial applications such as the cooling of continuous strips, glass fibre productio

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Filahi, Ismail, Mohamed Bourich, Mohammed Hasnaoui, and Abdelkhalek Amahmid. "Analytical and Numerical Study of Soret and Dufour Effects on Thermosolutal Convection in a Horizontal Brinkman Porous Layer with a Stress-Free Upper Boundary." Mathematical Problems in Engineering 2020 (March 31, 2020): 1–17. http://dx.doi.org/10.1155/2020/4046570.

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In this paper, thermo-diffusion (Soret effect) and diffusion-thermo (Dufour effect) effects on double-diffusive natural convection induced in a horizontal Brinkman porous layer with a stress-free upper boundary are investigated. The cavity is filled with a binary fluid and subjected to uniform fluxes of heat and mass on its long sides. An analytical solution based on the parallel flow approximation is developed for the problem considered in order to allow prompt determination of the thresholds of stationary and finite amplitude solutions and also heat and mass transfer characteristics. The ana

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Zeb, Salman, Suliman Khan, Zakir Ullah, et al. "Lie Group Analysis of Double Diffusive MHD Tangent Hyperbolic Fluid Flow over a Stretching Sheet." Mathematical Problems in Engineering 2022 (February 21, 2022): 1–14. http://dx.doi.org/10.1155/2022/9919073.

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In this study, we have used Lie group analysis procedure to propose a novel model for transforming the governing equations of double diffusive MHD hyperbolic tangent fluid flow model into a system of nonlinear ordinary differential equations (ODEs). The solution of these equations is then investigated numerically by employing Shooting method. We also reported and presented our results graphically illustrating the results and analysis of physical parameters on concentration, velocity, and temperature profiles and on other physical quantities present in the flow model. The results show that flui

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Santos, Francisco Junior Lemes. "Da obra do gozo ou do sentido do sintoma: desordem simbólica e mínimo de Outro." Estilos da Clinica 28, no. 2 (2023): 264–76. http://dx.doi.org/10.11606/issn.1981-1624.v28i2p264-276.

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No fundamento do que o filósofo Dany-Robert Dufour chama de dessimbolização está o esvaecimento do grande Sujeito, o desaparecimento do Outro. Este, um conceito eminentemente psicanalítico, considerável no ensino do psicanalista Jacques-Marie Émile Lacan, do qual o filósofo francês se serve. Se foi possível a Dufour indicar um processo de dessimbolização, não é porque a questão do Outro permaneceu intacta. O fato é que, na psicanálise lacaniana, também não. Esta pesquisa bibliográfica toma o singular paradoxo apresentado por Dufour, que aventa um regozijo frente ao sofrimento imiscuído na dess

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Kefayati, Gholamreza. "Soret and Dufour effects on double diffusive mixed convection of Newtonian and shear-thinning fluids in a two sided lid-driven cavity." Engineering Computations 33, no. 7 (2016): 2117–48. http://dx.doi.org/10.1108/ec-10-2015-0300.

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Purpose The thermal-diffusion (Soret) and the diffusion-thermo (Dufour) effects play a crucial role in double diffusive mixed convection in a lid-driven cavity; but they have not been studied properly by researchers. The purpose of this paper is to investigate effects of Soret and Dufour parameters on double diffusive laminar mixed convection of shear-thinning and Newtonian fluids in a two-sided lid-driven cavity. Design/methodology/approach Finite Difference Lattice Boltzmann method (FDLBM) has been applied to solve the complex problem. This study has been conducted for the certain pertinent

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Rashidi, Mohammad Mehdi, Mohamed Ali, Behnam Rostami, Peyman Rostami, and Gong-Nan Xie. "Heat and Mass Transfer for MHD Viscoelastic Fluid Flow over a Vertical Stretching Sheet with Considering Soret and Dufour Effects." Mathematical Problems in Engineering 2015 (2015): 1–12. http://dx.doi.org/10.1155/2015/861065.

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The homotopy analysis method (HAM) with two auxiliary parameters is employed to examine heat and mass transfer in a steady two-dimensional magneto hydrodynamic viscoelastic fluid flow over a stretching vertical surface by considering Soret and Dufour effects. The two-dimensional boundary-layer governing partial differential equations are derived by considering the Boussinesq approximation. The highly nonlinear ordinary differential forms of momentum, energy, and concentration equations are obtained by similarity transformation. These equations are solved analytically in the presence of buoyanc

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Krementz, David G., Richard J. Barker, William A. Link, James E. Hines, Pat O. Corr, and Ray B. Owen. "Response to Dufour and Ankney." Ornis Scandinavica 21, no. 4 (1990): 301. http://dx.doi.org/10.2307/3676398.

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G, Lakshmi Devi, and Niranjan Hari. "INFLUENCE OF SORET AND DUFOUR, ACTIVATION ENERGY ON MHD CHEMICALLY REACTING NANOFLUID FLOW PAST A VERTICAL SURFACE WITH RADIATION." Latin American Applied Research - An international journal 52, no. 3 (2022): 239–46. http://dx.doi.org/10.52292/j.laar.2022.926.

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The current article aims to investigate Soret and Dufour's effects on MHD flow of heat and mass transfer nanofluid over a vertical stretching sheet with activation energy and radiation. Using Similarity transformations, the non-linear momentum, energy, solute, and nanoparticle concentration boundary layer equations are simplified. The resulting boundary layer equations are solved numerically with bvp4c and along with the shooting technique. The impact of various parameters on velocity, temperature, concentration, and nanoparticle volume fraction, Skin friction, local Sherwood and local Nusselt

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13

Hussain, Muzamil, Umer Farooq, Gulfam Bano, Jifeng Cui, and Taseer Muhammad. "Bioconvection Unsteady Magnetized Flow in a Horizontal Channel with Dufour and Soret Effects." Mathematical Problems in Engineering 2022 (January 29, 2022): 1–15. http://dx.doi.org/10.1155/2022/4771282.

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In the current decade, bioconvection phenomenon has received a lot of attention in research because of its applications in the biological polymer synthesis, biosensors and biotechnology, pharmaceutical industry, microbial enhanced oil recovery, environmentally friendly applications, and continuous refinements in mathematical modeling. Therefore, this article is prepared to address the unsteady mixed bioconvection in electrically conducting fluid flow between two infinite parallel plates with magnetic field and first-order chemical reaction impacts. Furthermore, the heat and mass transfer study

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Srinivasacharya, D., and K. Kaladhar. "Soret and dufour effects on free convection flow of a couple stress fluid in a vertical channel with chemical reaction." Chemical Industry and Chemical Engineering Quarterly 19, no. 1 (2013): 45–55. http://dx.doi.org/10.2298/ciceq111231041s.

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The Soret and Dufour effects in the presence of chemical reaction on natural convection heat and mass transfer of a couple stress fluid in a vertical channel formed by two vertical parallel plates is presented. The governing non-linear partial differential equations are transformed into a system of ordinary differential equations using similarity transformations. The resulting equations are then solved using Homotopy Analysis Method (HAM). Profiles of dimensionless velocity, temperature and concentration are shown graphically for various values of Dufour number, Soret number, Couple stress par

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Ahmed, N. "MHD convection with Soret and Dufour effects in a three-dimensional flow past an infinite vertical porous plate." Canadian Journal of Physics 88, no. 9 (2010): 663–74. http://dx.doi.org/10.1139/p10-056.

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In this paper, the Soret and Dufour effects on a mixed convective mass transfer flow past an infinite vertical porous plate with transverse sinusoidal suction velocity in presence of a uniform transverse magnetic field have been studied analytically. The magnetic Reynolds number is assumed to be so small that the induced magnetic field can be neglected. The nondimensional equations governing the flow and heat and mass transfer are solved by regular perturbation technique, on the assumption that the solution consists of two parts: a mean part and a perturbed part. The expressions for the veloci

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Jagan, Kandasamy, and Sivanandam Sivasankaran. "Soret & Dufour and Triple Stratification Effect on MHD Flow with Velocity Slip towards a Stretching Cylinder." Mathematical and Computational Applications 27, no. 2 (2022): 25. http://dx.doi.org/10.3390/mca27020025.

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The phenomenon of convective flow with heat and mass transfer has been studied extensively due to its applications in various fields. The effects of nonlinear thermal radiation (NLTR), slip, thermal-diffusion (Soret) and diffusion-thermo (Dufour) on magenoto-hydrodynamic (MHD) flow towards a stretching cylinder in the presence of triple stratification (TSF) are investigated in this paper. The governing equations are transformed into an ODE by suitable transformations. The homotopy analysis method (HAM) is used to solve the ODE. The revamping of fluid flow, and heat transfer due to the presence

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Hasen, Saba S., and Ahmed M. Abdulhadi. "Analytical Study of Soret and Dufour effect in the Electro-osmotic peristaltic flow of Rabinowitsch fluid model." Ibn AL- Haitham Journal For Pure and Applied Sciences 34, no. 2 (2021): 70–86. http://dx.doi.org/10.30526/34.2.2629.

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The present paper concerned with study the of combined electro-osmotic peristaltic transport with heat and mass transfer which is represented by the Soret and Dufour phenomenon with the presence of the Joule electrothermal heating through a microchannel occupy by Rabinowitsch fluid. The unsteady two-dimensional governing equations for flow with energy and concentration conservation have been formed in a Cartesian coordinate system and the lubrication theory is applied to modify the relevant equations to the problem. The Debye-Hukel linearization approximation is utilizing to modify the electro

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Alexandre, Alain. "Richard Dufour, sculpteur et statuaire rouennais." Études Normandes 61, no. 1 (2012): 29–38. http://dx.doi.org/10.3406/etnor.2012.1865.

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19

Jaber, Khaled K. "Influence of Dofour and Soret on Eyrig-Powell Nanofluid Flow from A Circular Cylinder with Viscous Dissipation." European Journal of Mathematics and Statistics 4, no. 4 (2023): 69–77. http://dx.doi.org/10.24018/ejmath.2023.4.4.181.

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The impact of Viscous dissipation on the heat and mass transfer characteristics of an Eyring Powell nanofluid flow past a horizontal circular cylinder is intensively investigated in the presence of Dufour and Soret effects. The free laminar flow is subject to a uniform transverse magnetic field. The continuity, momentum, energy, and concentrations equations are transformed into a nonlinear system of partial differential equations using appropriate non-similarity variables. The transformed system was solved numerically using the fourth order Runge Kutta method. The effect of parameters includin

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Shateyi, Stanford, Sandile Sydney Motsa, and Precious Sibanda. "The Effects of Thermal Radiation, Hall Currents, Soret, and Dufour on MHD Flow by Mixed Convection over a Vertical Surface in Porous Media." Mathematical Problems in Engineering 2010 (2010): 1–20. http://dx.doi.org/10.1155/2010/627475.

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The study sought to investigate the influence of a magnetic field on heat and mass transfer by mixed convection from vertical surfaces in the presence of Hall, radiation, Soret (thermal-diffusion), and Dufour (diffusion-thermo) effects. The similarity solutions were obtained using suitable transformations. The similarity ordinary differential equations were then solved by MATLAB routinebvp4c. The numerical results for some special cases were compared with the exact solution and those obtained by Elgazery (2009) and were found to be in good agreement. A parametric study illustrating the influen

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Mohammad, Saddam Atteyia. "Effects of Soret and Dufour on Mixed Convection over a Cone in a Non-Darcy Porous Medium with Chemical Reaction." International Research Journal of Innovations in Engineering and Technology 06, no. 02 (2022): 86–93. http://dx.doi.org/10.47001/irjiet/2022.602015.

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This work explore the boundary layer behavior under the effects of Soret and Dufour on the mixed convection adjacent to inverted cone immersed within non-Darcian porous milieu together with chemical reaction action. The natural and forced convection limits are also considered in this study. The equations governing the problem together with the boundary conditions are converted to non-similar non-dimensional shape and solved numerically using finite difference method. It was found that enhances the value of the Soret number will increase the amount of heat transport and decrease the amount of m

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Mohan, Hari, Pardeep Kumar, and Pawittar Singh. "On generalized hydromagnetic thermosolutal convection: The Dufour-effect." Thermal Science 9, no. 1 (2005): 139–50. http://dx.doi.org/10.2298/tsci0501139m.

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The effect of uniform magnetic field on the Dufour-driven thermosolutal convection of an electrically conducting fluid completely confined in an arbitrary region bounded by rigid walls is considered. Some general qualitative results concerning the character of marginal state, stability of oscillatory motions and limitations on the oscillatory motions of growing amplitude, are derived. The results for the horizontal layer geometry in the present case follow as a consequence.

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DAS, U. J. "SORET AND DUFOUR EFFECTS ON THREE DIMENSIONAL MIXED CONVECTIVE HYDROMAGENTIC FLOW OF A VISCO-ELASTIC FLUID PAST AN INFINITE INCLINED PLATE." Latin American Applied Research - An international journal 49, no. 1 (2019): 7–12. http://dx.doi.org/10.52292/j.laar.2019.278.

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This study focuses analytically on a steady three dimensional mixed convective hydromagnetic flow of an incompressible, electrically conducting, visco-elastic fluid past an infinite inclined porous plate with transverse sinusoidal suction velocity, incorporating Soret and Dufour effects. The expressions for the velocity, temperature field, concentration field, skin friction at the plate, Nusselt number and Sherwood number at the plate are obtained. It is seen that fluid velocity decreases under the effects of Soret number and visco-elastic parameter. Also, it is seen that skin friction increas

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Noreen, Waheed, Hussanan, and Lu. "Entropy Analysis in Double-Diffusive Convection in Nanofluids through Electro-osmotically Induced Peristaltic Microchannel." Entropy 21, no. 10 (2019): 986. http://dx.doi.org/10.3390/e21100986.

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A theoretical study is presented to examine entropy generation in double-diffusive convection in an Electro-osmotic flow (EOF) of nanofluids via a peristaltic microchannel. Buoyancy effects due to change in temperature, solute concentration and nanoparticle volume fraction are also considered. This study was performed under lubrication and Debye-Hückel linearization approximation. The governing equations are solved exactly. The effect of dominant hydrodynamic parameters (thermophoresis, Brownian motion, Soret and Dufour), Grashof numbers (thermal, concentration and nanoparticle) and electro-os

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Favard, Florent. "Éric Dufour, Le Cinéma de science-fiction." Essais, no. 2 (November 15, 2012): 120–24. http://dx.doi.org/10.4000/essais.10560.

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Chand, Ramesh, and Gian Chand Rana. "Dufour and Soret Effects on the Thermosolutal Instability of Rivlin– Ericksen Elastico–Viscous Fluid in Porous Medium." Zeitschrift für Naturforschung A 67, no. 12 (2012): 685–91. http://dx.doi.org/10.5560/zna.2012-0074.

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Dufour and Soret effects on the convection in a horizontal layer of Rivlin-Ericksen elastico- viscous fluid in porous medium are considered. For the porous medium, the Darcy model is used. A linear stability analysis based upon normal mode analysis is employed to find a solution of the fluid layer confined between two free boundaries. The onset criterion for stationary and oscillatory convection has been derived analytically, and graphs have been plotted, giving various numerical values to various parameters, to depict the stability characteristics. The effects of the Dufour parameter, Soret p

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Choudhuri, K., Nazibuddin Ahmed, and Pranab Jyoti Parashar. "SORET AND DUFOUR EFFECTS IN A THREE-DIMENSIONAL MHD FLOW PAST A SEMI-INFINITE UNIFORMLY MOVING VERTICAL PLATE WITH CONSTANT HEAT FLUX." Latin American Applied Research - An international journal 53, no. 3 (2023): 263–70. http://dx.doi.org/10.52292/j.laar.2023.1000.

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In this paper, we have considered the three-dimensional MHD flow past a semi-infinite uniformly moving porous plate with Soret and Dufour effects. The plate is subjected to a sinu-soidal suction velocity and constant heat flux. It is assumed that a uniform magnetic field is applied normal to the plate and directed into the fluid region. But the induced magnetic field is neglected in the study on the assumption that the magnetic Reynolds number is very small. The analytic solutions are obtained by adopting the method of perturbation technique. The influence of magnetic field parameter, thermal

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Sengupta, Sanjib, and Nazibuddin Ahmed. "MHD free convective mass transfer flow of radiative uniform heat generation (absorption) fluid through a wavy permeable channel in the presence of Soret and Dufour effects." Canadian Journal of Physics 95, no. 1 (2017): 44–58. http://dx.doi.org/10.1139/cjp-2014-0599.

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The paper aims to present analytically the parametric effect of thermo-diffusion (Soret) and diffusion-thermo (Dufour) effects on a two-dimensional steady magnetohydrodynamic (MHD) free convective heat and mass transfer flow of a reasonably viscous incompressible electrically conducting fluid in the presence of thermal radiation and zeroth-order heat generation (absorption) effects. The governing system of partial differential equations with favorable boundary conditions is first non-dimensionalized and then solved by splitting the solution into a mean part and a perturbed part. Ostrach’s stat

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Kune, Ramesh, Hari Singh Naik, Borra Shashidar Reddy, and Christophe Chesneau. "Role of Nanoparticles and Heat Source/Sink on MHD Flow of Cu-H2O Nanofluid Flow Past a Vertical Plate with Soret and Dufour Effects." Mathematical and Computational Applications 27, no. 6 (2022): 102. http://dx.doi.org/10.3390/mca27060102.

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The study is devoted to investigating the effect of an unsteady non-Newtonian Casson fluid over a vertical plate. A mathematical analysis is presented for a Casson fluid by taking into consideration Soret and Dufour effects, heat generation, heat radiation, and chemical reaction. The novelty of the problem is the physical interpretation of Casson fluid before and after adding copper water-based nanoparticles to the governing flow. It is found that velocity was decreased and the temperature profile was enhanced. A similarity transformation is used to convert the linked partial differential equa

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Olagbemiro, T. O., K. M. Sani, L. Lajide, M. O. Agoh, B. W. Staddon, and C. E. Chukwu. "trans-4-Phenyl-3-buten-2-one from the African Harvester Ant Messor galla (Mayr) (Hymenoptera: Formicidae)." Zeitschrift für Naturforschung B 43, no. 3 (1988): 339–42. http://dx.doi.org/10.1515/znb-1988-0317.

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By gas chromatography mass spectrometry and synthesis of authentic standard, trans-4-phenyl-3- buten-2-one for the first time as well as known hydrocarbons have been identified in the Dufour′s gland secretion of the African harvester ant Messor galla (Mayr).

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Mahajan, R. L., and C. Wei. "Buoyancy, Soret, Dufour, and Variable Property Effects in Silicon Epitaxy." Journal of Heat Transfer 113, no. 3 (1991): 688–95. http://dx.doi.org/10.1115/1.2910619.

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In most of the previous numerical and semi-analytical studies of silicon epitaxial deposition, a common practice has been to neglect the buoyancy flow, Dufour, Soret, and property variation effects. In this paper, we take a critical look at the validity of that approach and point out some fallacies. The geometric configuration studied is a horizontal reactor for the susceptor tilt angles of 0 and 2.9 deg. The full Navier-Stokes equations coupled with those for the energy and species transfer are solved numerically for a range of parameters typical of commercial silicon epitaxial deposition sys

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Frogerais, André, Dominique Kassel, and Annik Sultan-Paré. "Le laboratoire des Cachets Sandol, Dufour and Paré." Revue d'histoire de la pharmacie 105, no. 399 (2018): 343–50. http://dx.doi.org/10.3406/pharm.2018.23665.

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Desjardins, France, and Jeanne Simard. "Émilie Dufour, conseillère en développement collectif chez Communagir." Revue Organisations & territoires 31, no. 3 (2023): 151–57. http://dx.doi.org/10.1522/revueot.v31n3.1526.

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ABDALLA, F. C., and C. da CRUZ-LANDIM. "Dufour glands in the hymenopterans (Apidae, Formicidae, Vespidae): a review." Revista Brasileira de Biologia 61, no. 1 (2001): 95–106. http://dx.doi.org/10.1590/s0034-71082001000100013.

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Associated to the sting apparatus of the aculeate hymenopterans is found the poison gland, originated from the glands associated to the ovipositor of the non-aculeate hymenopterans and the less derived Dufour gland, homologue of the coletterial gland of other insects, and found in all hymenopteran females. The Dufour gland functions is mostly uncertain in hymenopterans but in ants it is involved with communication and defense and in non social bees with the nest building and protection. In wasps possibly with kin-recognition. Differences in morphology and chemical composition of the gland secr

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Wahid, Nur Syahirah, Norihan Md Arifin, Najiyah Safwa Khashi’ie, Ioan Pop, Norfifah Bachok, and Mohd Ezad Hafidz Hafidzuddin. "Hybrid Nanofluid Radiative Mixed Convection Stagnation Point Flow Past a Vertical Flat Plate with Dufour and Soret Effects." Mathematics 10, no. 16 (2022): 2966. http://dx.doi.org/10.3390/math10162966.

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The widespread application of hybrid nanofluid in real applications has been accompanied by a large increase in computational and experimental research. Due to the unique characteristics of hybrid nanofluid, this study aspires to examine the steady two-dimensional mixed convection stagnation point flow of a hybrid nanofluid past a vertical plate with radiation, Dufour, and Soret effects, numerically. The formulations of the specific flow model are presented in this study. The model of fluid flow that is expressed in the form of partial differential equations is simplified into ordinary differe

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Verma, Krishnandan, and B. R. Sharma. "SORET AND DUFOUR EFFECTS ON MHD FLOW WITH HEAT AND MASS TRANSFER PAST AN EXPONENTIALLY STRETCHING SHEET." Latin American Applied Research - An international journal 52, no. 2 (2022): 83–88. http://dx.doi.org/10.52292/j.laar.2022.795.

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The current study aims to explore the impact of Soret and Dufour effects past a stretching surface with heat and mass transfer on MHD fluid flow including the effects of heat sink and radiation. Similarity transformations are employed to deduce the governing partial differential equations of flow, heat and mass transfer to system of nonlinear ODEâ€™s. The equations together with boundary conditions so obtained are solved using numerical technique by employing Matlabâ€™s solver bvp4c. The graph of fluid velocity, temperature and concentration distributions are obtained for different parameters

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Nisar, Kottakkaran Sooppy, Umair Khan, Aurang Zaib, Ilyas Khan, and Dumitru Baleanu. "Exploration of Aluminum and Titanium Alloys in the Stream-Wise and Secondary Flow Directions Comprising the Significant Impacts of Magnetohydrodynamic and Hybrid Nanofluid." Crystals 10, no. 8 (2020): 679. http://dx.doi.org/10.3390/cryst10080679.

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This exploration examines the nonlinear effect of radiation on magnet flow consisting of hybrid alloy nanoparticles in the way of stream-wise and cross flow. Many experimental, as well as theoretical explorations, demonstrated that the thermal conductivity of the regular liquid increases by up to 15 to 40% when nanomaterials are mixed with the regular liquid. This change of the thermal conductivity of the nanoliquid depends on the various characteristics of the mixed nanomaterials like the size of the nanoparticles, the agglomeration of the particles, the volume fraction, etc. Researchers have

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Motsa, S. S., and S. Shateyi. "Successive Linearization Analysis of the Effects of Partial Slip, Thermal Diffusion, and Diffusion-Thermo on Steady MHD Convective Flow due to a Rotating Disk." Mathematical Problems in Engineering 2012 (2012): 1–15. http://dx.doi.org/10.1155/2012/397637.

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We proposed a general formulation of the successive linearization method for solving highly nonlinear boundary value problem arising in rotating disk flow. The problem was studied under the effects of partial slip, thermal diffusion, and diffusion-thermo. The governing fundamental conservation equations of mass, momentum, angular momentum, energy, and concentration are transformed into a system of ordinary differential equations by means of similarity transformations. A parametric study illustrating the influence of the magnetic field, slip factor, Eckert number, Dufour and Soret numbers was c

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Bertei, Antonio, Andrea Lamorgese, and Roberto Mauri. "Constitutive Relations of Thermal and Mass Diffusion." Journal of Non-Equilibrium Thermodynamics 45, no. 1 (2020): 27–38. http://dx.doi.org/10.1515/jnet-2019-0055.

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AbstractNon-equilibrium thermodynamics provides a general framework for the description of mass and thermal diffusion, thereby including also cross-thermal and material diffusion effects, which are generally modeled through the Onsager coupling terms within the constitutive equations relating heat and mass flux to the gradients of temperature and chemical potential. These so-called Soret and Dufour coefficients are not uniquely defined, though, as they can be derived by adopting one of the several constitutive relations satisfying the principles of non-equilibrium thermodynamics. Therefore, ma

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Kaigalula, Victor, and Samuel Mutua. "Soret and Dufour Effects on MHD Fluid Flow Through a Collapssible Tube Using Spectral Based Collocation Method." Applied and Computational Mathematics 13, no. 1 (2024): 8–28. http://dx.doi.org/10.11648/j.acm.20241301.12.

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This paper examine numerical study for soret and dufour effects on unsteady Newtonian MHD fluid flow with mass and heat transfer in a collapsible elastic tube using Spectral Collocation technique. The objective of the study is to determine the velocity, temperature and concentration profiles together with heat and mass transfer rates. The governing equations are continuity, momentum, energy and concentration equation. The system of nonlinear partial differential equations governing the flow solved numerically by applying collocation method and implemented in MATLAB. The numerical solution of t

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Vynohradska, O. "DEVELOPMENT AND ADOPTION OF THE CONSTITUTION OF THE THIRD REPUBLIC." POLISH JOURNAL OF SCIENCE, no. 65 (August 14, 2023): 10–13. https://doi.org/10.5281/zenodo.8242537.

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The process of constitutional drafting began, in our opinion, in 1873. It was in this year that the first constitutional draft was presented by Minister of Justice Dufour and a constitutional commission was established. This draft Constitution is often referred to as the Thiers-Dufour draft. Therefore, many of the main constitutional provisions coincide with J. Dufort's proposals. According to this draft, consisting of sixteen articles, the Parliament of the French Republic is composed of the Senate and the Chamber of Deputies. The head of state is the President of the Republic. The Senate

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Khan, Sohail A., and Tasawar Hayat. "Entropy Analysis for Hydromagnetic Darcy–Forchheimer Flow Subject to Soret and Dufour Effects." Mathematical and Computational Applications 27, no. 5 (2022): 80. http://dx.doi.org/10.3390/mca27050080.

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Here, our main aim is to examine the impacts of Dufour and Soret in a radiative Darcy–Forchheimer flow. Ohmic heating and the dissipative features are outlined. The characteristics of the thermo-diffusion and diffusion-thermo effects are addressed. A binary chemical reaction is deliberated. To examine the thermodynamical system performance, we discuss entropy generation. A non-linear differential system is computed by the finite difference technique. Variations in the velocity, concentration, thermal field and entropy rate for the emerging parameters are scrutinized. A decay in velocity is obs

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Hayat, Tasawar, Meraj Mustafa, and Said Mesloub. "Mixed Convection Boundary Layer Flow over a Stretching Surface Filled with a Maxwell Fluid in Presence of Soret and Dufour Effects." Zeitschrift für Naturforschung A 65, no. 5 (2010): 401–10. http://dx.doi.org/10.1515/zna-2010-0505.

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This article looks at the heat and mass transfer characteristics in mixed convection boundary layer flow about a linearly stretching vertical surface. An incompressible Maxwell fluid occupying the porous space takes into account the diffusion-thermo (Dufour) and thermal-diffusion (Soret) effects. The governing partial differential equations are transformed into a set of coupled ordinary differential equations, by invoking similarity transformations. The involved nonlinear differential system is solved analytically using the homotopy analysis method (HAM) to determine the convergent series expr

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Anusha, P., M. Naga Swapna Sri, V. V. Venu Madhav, et al. "Dynamics of MHD Convection of Walters B Viscoelastic Fluid through an Accelerating Permeable Surface Using the Soret–Dufour Mechanism." Applied Sciences 12, no. 19 (2022): 9431. http://dx.doi.org/10.3390/app12199431.

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The MHD convective Walters-B memory liquid flow past a permeable accelerating surface with the mechanism of Soret-Dufour is considered. The flow equation constitutes a set of partial differential equations (PDEs) to elucidate the real flow of a non-Newtonian liquid. The radiation thermo-physical parameters were employed based on the use of Roseland approximation. This implies the fluid employed in this exploration is optically thick. Utilizing suitable similarity terms, the flow equation PDEs were simplified to become total differential equations. The spectral homotopy analysis method (SHAM) w

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Costa, O. L. V., and F. Dufour. "The Vanishing Discount Approach for the Average Continuous Control of Piecewise Deterministic Markov Processes." Journal of Applied Probability 46, no. 4 (2009): 1157–83. http://dx.doi.org/10.1239/jap/1261670695.

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This work is concerned with the existence of an optimal control strategy for the long-run average continuous control problem of piecewise-deterministic Markov processes (PDMPs). In Costa and Dufour (2008), sufficient conditions were derived to ensure the existence of an optimal control by using the vanishing discount approach. These conditions were mainly expressed in terms of the relative difference of the α-discount value functions. The main goal of this paper is to derive tractable conditions directly related to the primitive data of the PDMP to ensure the existence of an optimal control. T

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Rodrigues da Silva, André. "A Ausência Como Presença:Uma Discussão Sobre O Dispositivo Pronominal Trinitário." PERcursos Linguísticos 12, no. 31 (2022): 126–39. http://dx.doi.org/10.47456/pl.v12i31.38647.

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Neste artigo, me proponho a discutir e refletir sobre o dispositivo trinitário pronominal de Dany-Robert Dufour, a fim de pensar o seu uso na análise do texto literário. Com isso, utilizaram-se excertos da obra O Estrangeiro (1942), de Albert Camus, a fim de pensar na reversibilidade pronominal, o eu e o tu, diante da oposição que se instaura ao ele, no texto literário. Dividida em duas partes, O Estrangeiro traz Meursault, que sofre uma reviravolta em sua vida após cometer um assassinato no final da primeira parte do livro. A partir disso, na segunda parte, Meursault se vê cada vez mais dista

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CRUZ-LANDIM, C., and R. D. REGINATO. "Exocrine glands of Schwarziana quadripunctata (Hymenoptera, Apinae, Meliponini)." Brazilian Journal of Biology 61, no. 3 (2001): 497–505. http://dx.doi.org/10.1590/s1519-69842001000300020.

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This article describes the location, anatomy, histology and ontogeny of adult Schwarziana quadripunctata exocrine glands. These glands appear either as individualized organs (salivary gland system and Dufour gland) or as epidermis differentiation (tegumentary glands). Variations in the occurrence and degree of development among colony components with regard to their degree of maturity are also described.

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Das, Utpal Jyoti. "MHD POISEUILLE FLOW WITH SORET AND DUFOUR EFFECTS UNDER SLIP BOUNDARY CONDITIONS." Latin American Applied Research - An international journal 51, no. 3 (2021): 159–63. http://dx.doi.org/10.52292/j.laar.2021.615.

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A steady MHD flow is analyzed in presence of Soret and Dufour effects with consideration of induced magnetic field under slip boundary conditions. The walls of the channel are porous, isothermal and subjected to injection/suction at a constant velocity. The effects of various flow parameters on velocity, magnetic field intensity, temperature, concentration, skin friction, Nusselt number and Sherwood number are discussed.

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Khalid, I. K., N. F. M. Mokhtar, I. Hashim, Z. B. Ibrahim, and S. S. A. Gani. "Effect of Internal Heat Source on the Onset of Double-Diffusive Convection in a Rotating Nanofluid Layer with Feedback Control Strategy." Advances in Mathematical Physics 2017 (2017): 1–12. http://dx.doi.org/10.1155/2017/2789024.

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A linear stability analysis has been carried out to examine the effect of internal heat source on the onset of Rayleigh–Bénard convection in a rotating nanofluid layer with double diffusive coefficients, namely, Soret and Dufour, in the presence of feedback control. The system is heated from below and the model used for the nanofluid layer incorporates the effects of thermophoresis and Brownian motion. Three types of bounding systems of the model have been considered which are as follows: both the lower and upper bounding surfaces are free, the lower is rigid and the upper is free, and both of

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Jamir, Temjennaro, and Hemanta Konwar. "Unsteady Magnetohydrodynamic Slip Flow, Heat and Mass Transfer over a Permeable Stretching Cylinder with Soret and Dufour Effects in Porous Medium." Defect and Diffusion Forum 424 (May 8, 2023): 143–54. http://dx.doi.org/10.4028/p-jwdu0s.

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This study considers the unsteady magnetohydrodynamic slip flow past a permeable stretching cylinder by taking into account the Soret and Dufour effects. Using similarity transformations, the partial differential equations governing the flow, heat, and mass transfers are transformed into a system of ordinary differential equations. These equations are numerically solved for a variety of governing parameter values using the boundary value problem solved package, bvp4c, which is available in the MATLAB software. The outcomes of the governing parameters on the skin friction coefficient, Nusselt a

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