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Direct numerical simulation for flow and heat transfer through random open-cell solid foams: Development of an IBM based CFD model

Paper ID Volume ID Publish Year Pages File Format Full-Text
53232 46955 2016 11 PDF Available
Title
Direct numerical simulation for flow and heat transfer through random open-cell solid foams: Development of an IBM based CFD model
Abstract

•A novel IBM based framework to fully resolve random open-cell solid foam geometry in a Cartesian computational domain.•Accurate incorporation of temperature Neumann, Dirichlet and conjugate heat transfer conditions at the fluid-solid interface.•Flow and heat transfer study for a typical foam sample.

In the present contribution a sharp interface Immersed Boundary Method (IBM) for flow and heat transfer has been developed to fully resolve highly complex random solid structure on a non-body fitted Cartesian computational grid. A 3D image data set from a Micro-CT (computed tomography) scan of an actual foam geometry is usually converted into a surface mesh of unstructured triangular elements and the current frame work can embed it as an immersed boundary in the CFD domain. A second-order implicit (semi-implicit) method is used to incorporate fluid-solid coupling for flow (heat transfer) at the non-conforming immersed boundary in a structured grid. Both temperature Dirichlet and Neumann boundary conditions, as well as a conjugate heat transfer condition are incorporated at the fluid–solid interface. The proposed method is validated rigorously with existing literature results. The use of a Cartesian grid for flow makes this method robust, computational friendly, and at the same time it avoids the tedious volumetric mesh generation process for very complex shapes. To demonstrate the capability of the current method, it is applied to study flow and heat transfer of a typical foam sample with different flow properties. A closure for pressure drop and heat transfer coefficient are derived for the typical foam sample.

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Keywords
Porous medium; Open-cell solid foam; Pore-scale level numerical simulation; Immersed boundary method (IBM); Conjugate heat transfer
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Direct numerical simulation for flow and heat transfer through random open-cell solid foams: Development of an IBM based CFD model
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 273, 15 September 2016, Pages 140–150
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us