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The Development And Numerical Modelling Of A Representative Elemental Volume For Packed Sand, Ashraf Thabet
The Development And Numerical Modelling Of A Representative Elemental Volume For Packed Sand, Ashraf Thabet
Electronic Thesis and Dissertation Repository
The motivation of this thesis is the development of simple microscopic-scale model (representative elemental volume; REV) that can be used to conduct flow and heat transfer simulations from which closure coefficients can be established for the volume-averaged transport equations for porous media (packed bed). The thesis provides a brief introduction to the computational technique adopted for the geometric generation of the REV (YADE), followed by a parametric study undertaken to reveal the minimum number of particles inside the REV that are required to mimic the appropriate physics. Additional analysis was conducted with the goal of determining the influence of deviation …
Modelling Of Convective Heat Transfer In Porous Media, Jeremy Vu
Modelling Of Convective Heat Transfer In Porous Media, Jeremy Vu
Electronic Thesis and Dissertation Repository
This thesis details the process taken for the computational modelling of convective heat transfer in porous media. An in-house porous continuum model is modified to improve the prediction of heat transfer which is obtained when forcing fluid through porous blocks heated from one side. The results are compared to those obtained from CFD simulations performed using commercial software. Results indicated that a modification to conductivity the solid phase of the porous material must be included due to the tortuosity, or the complexity of the solid structure. Previously the tortuosity was not considered when calculating the effective solid phase conductivity.The implementation …