Mass Transfer and Pressure Rise in Moist Porous Material Subjected to Sudden Heating

1977 ◽  
Vol 99 (1) ◽  
pp. 105-112 ◽  
Author(s):  
H. Saito ◽  
N. Seki
Keyword(s):  
Mass Transfer ◽  
Porous Material ◽  
Heat And Mass Transfer ◽  
Pressure Rise ◽  
Maximum Pressure ◽  
Initial Water Content ◽  
Initial Water ◽  
Finite Difference Equations ◽  
Basic Equations ◽  
Moist Porous Material

In this paper the authors treat heat and mass transfer which may occur in a moist porous material when it is subjected to a sudden heating of a prescribed temperature at the surface. The basic equations describing the heat and mass transfer and their dimensionless forms are presented. Thereafter, a procedure to solve the basic equations is mentioned by using their finite difference equations. Referring to the results of the numerical computations, the influences of various parameters including thermal conductivity, heat capacity, void fraction, mobility, and initial water content of the material upon temperature, pressure, and moisture distributions in the material are discussed in detail. As a conclusion of these discussions, the authors present an empirical formula to predict the maximum pressure. The proposed formula is compared with experimental results and it is found that the formula is useful for the prediction of the maximum pressure occurring in the material during heating.

Analysis of Mixed Convective Heat and Mass Transfer on Peristaltic Flow of Fene-P Fluid with Chemical Reaction

2015 ◽  
Vol 32 (1) ◽  
pp. 83-92 ◽  
Author(s):  
Z. Asghar ◽  
N. Ali
Keyword(s):  
Mass Transfer ◽  
Heat And Mass Transfer ◽  
Chemical Reaction ◽  
Wave Length ◽  
Linear Equations ◽  
Pressure Rise ◽  
Boussinesq Approximation ◽  
Flow Equations ◽  
Highly Nonlinear ◽  
Concentration Changes

AbstractThis study presents the influence of heat and mass transfer on peristaltic transport of Finitely Extensible Nonlinear Elastic Peterlin (FENE-P) fluid in the presence of chemical reaction. It is assumed that all the fluid properties, except the density are constant. The Boussinesq approximation which relates density change to temperature and concentration changes is used in formulating buoyancy force terms in the momentum equation. Moreover, we neglect viscous dissipation and include diffusion-thermal (Dufour) and thermal-diffusion (Soret) effects in the present analysis. By the consideration of such important aspects the flow equations become highly nonlinear and coupled. In order to make the problem tractable we have adopted widely used assumptions of long wave length and low Reynolds number. An exact solution of the simplified coupled linear equations for the temperature and concentration has been obtained whereas numerical solution is obtained for dimensionless stream function and pressure gradient. The effects of different parameters on velocity field, temperature and concentration fields and trapping phenomenon are highlighted through various graphs. Numerical integration has been performed to analyze pressure rise per wavelength.

scholarly journals Peristaltic Motion of Non-Newtonian Fluid with Heat and Mass Transfer through a Porous Medium in Channel under Uniform Magnetic Field

2014 ◽  
Vol 2014 ◽  
pp. 1-12 ◽  
Author(s):  
Nabil T. M. Eldabe ◽  
Bothaina M. Agoor ◽  
Heba Alame
Keyword(s):  
Magnetic Field ◽  
Mass Transfer ◽  
Porous Medium ◽  
Heat And Mass Transfer ◽  
Newtonian Fluid ◽  
Pressure Rise ◽  
Perturbation Series ◽  
Peristaltic Motion ◽  
Method Of Solution ◽  
Permeability Parameter

This paper is devoted to the study of the peristaltic motion of non-Newtonian fluid with heat and mass transfer through a porous medium in the channel under the effect of magnetic field. A modified Casson non-Newtonian constitutive model is employed for the transport fluid. A perturbation series’ method of solution of the stream function is discussed. The effects of various parameters of interest such as the magnetic parameter, Casson parameter, and permeability parameter on the velocity, pressure rise, temperature, and concentration are discussed and illustrated graphically through a set of figures.

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