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Grid independence via automated unstructured adaptation / Ronald J. Chila in Transactions of the ASME . Journal of fluids engineering, Vol. 130 N° 12 (Décembre 2008) 

Public ISBD [article]  in Transactions of the ASME . Journal of fluids engineering > Vol. 130 N° 12 (Décembre 2008) . - 7 p. Titre : Grid independence via automated unstructured adaptation Type de document : texte imprimé Auteurs : Ronald J. Chila, Auteur ; Deborah A. Kaminski, Auteur Année de publication : 2009 Article en page(s) : 7 p. Note générale : Fluids engineering Langues : Anglais (eng) Mots-clés : Combustion;  channels  (Hydraulic  engineering);  sensors;  foundry  coatings;  computational  fluid  dynamics;  cycles;  errors;  airfoils;  hydrogen;  flow  (Dynamics) Résumé : Grid independence is frequently an overlooked item in computational fluid dynamics (CFD) analyses. Results obtained from grid dependent solutions may prove to be costly, in that engineering design decisions can be made using potentially faulty information. An automated method for grid independence is developed for two-dimensional unstructured wall function grids. Grid independence is achieved via successive levels of adaptive refinement. Adaptive refinement is performed in an automated manner and is based on multiple field variables. Sensors are placed at strategic locations within the flow field, which are determined by examining the CFD solution of a uniform grid. Three cases are examined, the backward-facing step, flow over an asymmetric transonic airfoil, and hydrogen combustion in a channel. Grid independent solutions are obtained for all three cases. Results for each case compare well with experimental data and/or other numerical predictions. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/Issue.aspx?issueID=27349 [...] [article] Grid independence via automated unstructured adaptation [texte imprimé] / Ronald J. Chila, Auteur ; Deborah A. Kaminski, Auteur . - 2009 . - 7 p. Fluids engineering Langues : Anglais (eng) in Transactions of the ASME . Journal of fluids engineering > Vol. 130 N° 12 (Décembre 2008) . - 7 p. Mots-clés : Combustion;  channels  (Hydraulic  engineering);  sensors;  foundry  coatings;  computational  fluid  dynamics;  cycles;  errors;  airfoils;  hydrogen;  flow  (Dynamics) Résumé : Grid independence is frequently an overlooked item in computational fluid dynamics (CFD) analyses. Results obtained from grid dependent solutions may prove to be costly, in that engineering design decisions can be made using potentially faulty information. An automated method for grid independence is developed for two-dimensional unstructured wall function grids. Grid independence is achieved via successive levels of adaptive refinement. Adaptive refinement is performed in an automated manner and is based on multiple field variables. Sensors are placed at strategic locations within the flow field, which are determined by examining the CFD solution of a uniform grid. Three cases are examined, the backward-facing step, flow over an asymmetric transonic airfoil, and hydrogen combustion in a channel. Grid independent solutions are obtained for all three cases. Results for each case compare well with experimental data and/or other numerical predictions. En ligne : http://fluidsengineering.asmedigitalcollection.asme.org/Issue.aspx?issueID=27349 [...]