scholarly journals Convective transport in case of variable properties in porous enclosures with/without two heated ellipsis with rough boundaries

2020 ◽  
Vol 59 (5) ◽  
pp. 3927-3943
Author(s):  
Zehba A.S. Raizah ◽  
Sameh E. Ahmed
Keyword(s):  
Convective Transport ◽  
Variable Properties ◽  
Rough Boundaries

scholarly journals Computational Modeling of Protective Clothing

2003 ◽  
Vol os-12 (3) ◽  
pp. 1558925003os-12
Author(s):  
James J. Barry ◽  
Principal Engineer ◽  
Roger W. Hill
Keyword(s):  
Emergency Response ◽  
Protective Clothing ◽  
Three Dimensional ◽  
Convective Transport ◽  
Variable Properties ◽  
Computational Fluid Dynamics Cfd ◽  
Garment Design ◽  
Protective Garment ◽  
Good Agreement ◽  
Three Dimensional Simulations

Models based on computational fluid dynamics (CFD) have been developed to predict the performance of chemical and steam/fire protective clothing. The software computes the diffusive and convective transport of heat and gases/vapors; capillary transport of liquids; vapor and liquid sorption phenomena and phase change; and the variable properties of the various clothing layers. It can also model the effects of sweating and humidity transport to help assess the thermal stress imposed on the wearer of the clothing. Specialized geometry/grid representations of clothed humans have been created for performing two- and three-dimensional simulations. Comparisons with experimental data show good agreement in predicting the effects of fiber swell due to transients in humidity, and the models have been used to predict the sensitivity of clothing performance to material properties such as permeability under varying environmental conditions. Applications of the models include analysis of chemical protective garment design for military and emergency response personnel, comparisons of thermally protective materials for steam or fire protection, and evaluation of clothing test data.

SEEPAGE HEAT TRANSFER BETWEEN CLINKER AND COOLING AIR WITH VARIABLE PROPERTIES OF THE GRATE COOLER

2017 ◽  
Vol 48 (3) ◽  
pp. 263-281 ◽  
Author(s):  
Meiqi Wang ◽  
Bin Liu ◽  
Yan Wen ◽  
Haoran Liu
Keyword(s):  
Heat Transfer ◽  
Variable Properties ◽  
Grate Cooler ◽  
Cooling Air

Mass Transport Modelling in Porous Media Using Delay Differential Equations

2006 ◽  
Vol 258-260 ◽  
pp. 586-591
Author(s):  
António Martins ◽  
Paulo Laranjeira ◽  
Madalena Dias ◽  
José Lopes
Keyword(s):  
Porous Media ◽  
Differential Equations ◽  
Mass Transport ◽  
Delay Differential Equations ◽  
Dispersion Model ◽  
Flow Characteristics ◽  
Convective Transport ◽  
Transport Modelling ◽  
Flow Field Characteristics ◽  
Delay Differential

In this work the application of delay differential equations to the modelling of mass transport in porous media, where the convective transport of mass, is presented and discussed. The differences and advantages when compared with the Dispersion Model are highlighted. Using simplified models of the local structure of a porous media, in particular a network model made up by combining two different types of network elements, channels and chambers, the mass transport under transient conditions is described and related to the local geometrical characteristics. The delay differential equations system that describe the flow, arise from the combination of the mass balance equations for both the network elements, and after taking into account their flow characteristics. The solution is obtained using a time marching method, and the results show that the model is capable of describing the qualitative behaviour observed experimentally, allowing the analysis of the influence of the local geometrical and flow field characteristics on the mass transport.

Mass and heat transport impact on the peristaltic flow of a Ree–Eyring liquid through variable properties for hemodynamic flow

Heat Transfer ◽  
2021 ◽  
Author(s):  
C. Rajashekhar ◽  
F. Mebarek‐Oudina ◽  
H. Vaidya ◽  
K. V. Prasad ◽  
G. Manjunatha ◽  
...  
Keyword(s):  
Heat Transport ◽  
Peristaltic Flow ◽  
Variable Properties ◽  
Hemodynamic Flow
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