Please use this identifier to cite or link to this item: https://doi.org/10.1016/j.compfluid.2013.04.014
Title: A finite-element method for the weakly compressible parabolized steady 3D Navier-Stokes equations in a channel with a permeable wall
Authors: Vynnycky, M.
Sharma, A.K.
Birgersson, E. 
Keywords: Fuel cells
Parabolized NS
Issue Date: Jul-2013
Source: Vynnycky, M., Sharma, A.K., Birgersson, E. (2013-07). A finite-element method for the weakly compressible parabolized steady 3D Navier-Stokes equations in a channel with a permeable wall. Computers and Fluids 81 : 152-161. ScholarBank@NUS Repository. https://doi.org/10.1016/j.compfluid.2013.04.014
Abstract: There are numerous scientific and technical applications that require the solution of the steady 3D Navier-Stokes equations in slender channels or ducts; often, this is carried out using commercially available software which is unable to make use of the fact that the equations can be parabolized to give a formulation that, in terms of CPU time and random access memory (RAM) usage, is orders of magnitude cheaper to compute. Here, we implement a velocity-vorticity formulation in a commercial finite-element solver to tackle the weakly compressible parabolized steady 3D Navier-Stokes equations in a channel with a permeable wall - a situation that occurs in polymer electrolyte fuel cells. Benchmarks results, for which the compressibility is present via a fluid density that is a function of channel length, indicate at least a 30-fold saving in CPU time and a 70-fold saving in RAM usage, as compared to full 3D computations, without any discernible loss in accuracy. © 2013 Elsevier Ltd.
Source Title: Computers and Fluids
URI: http://scholarbank.nus.edu.sg/handle/10635/54152
ISSN: 00457930
DOI: 10.1016/j.compfluid.2013.04.014
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