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主页 旧刊 有关人员 未来大会 American Society of Thermal and Fluids Engineering
First Thermal and Fluids Engineering Summer Conference

ISSN: 2379-1748

COMPARISON OF FINITE ELEMENT AND FINITE VOLUME ANALYSIS FOR ROUGH SURFACES USING MAPPED DOMAINS

Ashley Emery
Univ. Washington

R. J. Cochran
Applied CHT, Seattle, WA 98040

DOI: 10.1615/TFESC1.cmd.012941
pages 337-351


键词 Roughness, Monte Carlo, Conduction, Penetration Depth

摘要

The heat transfer from a domain with surface roughness to an underlying substrate is a function of the statistical nature of the roughness. It is rarely possible to characterize the conduction by an analytical expression. Consequently the simulation is usually done using Monte Carlo (MC) simulation based upon finite element or finite volume methods. For the MC simulations, each realization of the surface roughness requires a unique mesh leading to high computational costs. If the domain is mapped to a unit square or cube the mesh generation costs can be reduced. However, mapping introduces anisotropy into the modeling equations. Furthermore the mapping can be conservative or non-conservative in form, raising the question of which form is best. This paper analyses the effect of the induced anisotropy on the accuracy of finite element and finite volume methods.

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