Bifurcation phenomenon in Newtonian Fluid Flows through a Symmetric Sudden Expansion
Keywords:Sudden expansion, recirculation, flow separation, reattachment and bifurcation
The aim of the present study is to numerically investigate the bifurcation phenomenon in two dimensional sudden channel expansions. The numerical work is carried out using FLUENT, a commercial Computational Fluid Dynamics package. It uses the finite-volume method to solve the governing equations for a fluid. Geometry and grid is created using GAMBIT which is the preprocessor bundled with FLUENT. The working fluid used is di-ethylene glycol for steady, incompressible and laminar flow region. The present study shows that the re-attachment length and the size of re-circulation zones depend on the expansion ratio and Reynolds number.
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