Effects of Navier--Stokes Characteristic Outflow Boundary Conditions : modeling for transverse flows
Résumé
Navier--Stokes Characteristic Boundary Conditions are commonly used in DNS and LES to decrease the computational domain size and simulate practical engineering configurations. In this work, recent treatments of subsonic outflows are used and compared to evidence some limitations of these boundary conditions when the mainstream is transverse to the outflow. Some simulations of outgoing vortices and expanding premixed flames are performed to highlight the difficulties and distortions encountered with such transverse flows. A 3D-NSCBC-TOM outflow treatment is then proposed to reduce these distortions.
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albin2011ecm.pdf (882.31 Ko)
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posterECM_EA.pdf (2.22 Mo)
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