Ansys Flotran: Velocity or Pressure BC? -- CFD Online Discussion Forums

December 3, 2005, 16:26	Ansys Flotran: Velocity or Pressure BC?	#1
eu-ric thean Guest Posts: n/a	I am working on a CFD model that consists of a manifold. The pressure head from the compressor is 90 psig at the inlet. I specified P=0 at the outlet. With outlet pressure at atmospheric (Poutlet=0), the flow will be choked,thus the inlet velocity is the speed of sound. In the ANSYS documentation for compressible flow, only pressure is specified at inlet. I am confused on what boundary condition to apply for the inlet? Should it be velocity only? Or pressure only? Or both? Should the density be varied as well? Or keep it fixed at an air density relative to 90 psig? PLEASE HELP!!!

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