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Grid deformation strategies for CFD analysis of screw compressors / Sham Rane in International journal of refrigeration, Vol. 36 N° 7 (Novembre 2013) 

Public ISBD [article]  in International journal of refrigeration > Vol. 36 N° 7 (Novembre 2013) . - pp. 1883–1893 Titre : Grid deformation strategies for CFD analysis of screw compressors Titre original : Stratégies des grilles de déformation pour l'analyse des compresseurs à deux vis Type de document : texte imprimé Auteurs : Sham Rane, Auteur ; Ahmed Kovacevic, Auteur ; Nikola Stosic, Auteur Année de publication : 2014 Article en page(s) : pp. 1883–1893 Note générale : Refrigeration Langues : Anglais (eng) Mots-clés : Twin  screw  compressor;  CFD;  Space  conservation;  Deforming  grids;  Key-frame  re-meshing Résumé : Customized grid generation of twin screw machines for CFD analysis is widely used by the refrigeration and air-conditioning industry today, but is currently not suitable for topologies such as those of single screw, variable pitch or tri screw rotors. This paper investigates a technique called key-frame re-meshing that supplies pre-generated unstructured grids to the CFD solver at different time steps. To evaluate its accuracy, the results of an isentropic compression-expansion process in a reciprocating piston cylinder arrangement have been compared. Three strategies of grid deformation; diffusion equation mesh smoothing, user defined nodal displacement and key-frame remeshing have been assessed. There are many limitations to key-frame re-meshing. It requires time consuming pre-processing, has limited applicability to complex meshes and leads to inaccuracies in conservation of calculated variables. It was concluded that customized tools for generation of CFD grids are required for complex screw machines. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713000972 [article] Grid deformation strategies for CFD analysis of screw compressors = Stratégies des grilles de déformation pour l'analyse des compresseurs à deux vis [texte imprimé] / Sham Rane, Auteur ; Ahmed Kovacevic, Auteur ; Nikola Stosic, Auteur . - 2014 . - pp. 1883–1893. Refrigeration Langues : Anglais (eng) in International journal of refrigeration > Vol. 36 N° 7 (Novembre 2013) . - pp. 1883–1893 Mots-clés : Twin  screw  compressor;  CFD;  Space  conservation;  Deforming  grids;  Key-frame  re-meshing Résumé : Customized grid generation of twin screw machines for CFD analysis is widely used by the refrigeration and air-conditioning industry today, but is currently not suitable for topologies such as those of single screw, variable pitch or tri screw rotors. This paper investigates a technique called key-frame re-meshing that supplies pre-generated unstructured grids to the CFD solver at different time steps. To evaluate its accuracy, the results of an isentropic compression-expansion process in a reciprocating piston cylinder arrangement have been compared. Three strategies of grid deformation; diffusion equation mesh smoothing, user defined nodal displacement and key-frame remeshing have been assessed. There are many limitations to key-frame re-meshing. It requires time consuming pre-processing, has limited applicability to complex meshes and leads to inaccuracies in conservation of calculated variables. It was concluded that customized tools for generation of CFD grids are required for complex screw machines. En ligne : http://www.sciencedirect.com/science/article/pii/S0140700713000972