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Implicit Large Eddy Simulation of Flow in a Micro-Orifice with the Cumulant Lattice Boltzmann Method

GND
1132160340
Affiliation
Institute for Computational Modeling in Civil Engineering, TU Braunschweig
Kian Far, Ehsan;
GND
1132158834
Affiliation
Institute for Computational Modeling in Civil Engineering, TU Braunschweig
Geier, Martin;
GND
1132159024
Affiliation
Institute for Computational Modeling in Civil Engineering, TU Braunschweig
Kutscher, Konstantin;
GND
1132157587
Affiliation
Institute for Computational Modeling in Civil Engineering, TU Braunschweig
Krafczyk, Manfred

A detailed numerical study of turbulent flow through a micro-orifice is presented in this work. The flow becomes turbulent due to the orifice at the considered Reynolds numbers (∼104). The obtained flow rates are in good agreement with the experimental measurements. The discharge coefficient and the pressure loss are presented for two input pressures. The laminar stress and the generated turbulent stresses are investigated in detail, and the location of the vena contracta is quantitatively reproduced.

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