Setting Boundary Conditions

Training Guide > Compressible Flow Tutorials > Intake Tutorial > Setting Boundary Conditions

Setting Boundary Conditions

In this simulation, the free-stream Mach number is 0.21, the free-stream pressure is 98,258.18 Pa and the free-stream temperature is 300 K. We will use the default reference pressure of 101,325 Pa, which means that the free-stream gauge pressure is -3066.82 Pa.

Select the Regions > Fluid > Boundaries > Free_Stream node.

Set the Type property back to Free Stream.

Select the Free_Stream > Physics Values > Mach Number > Constant node.

Set the Value to 0.21.

Within the same Physics Values node, select the Static Pressure > Constant node. Set the Value to -3066.82.

The gauge pressure at the duct outlet is specified as -7903.35 Pa.

Select the Boundaries > Pressure > Physics Values > Static Pressure > Constant node and set the Value to -7903.35.

The mesh in the section downstream of the engine face is very coarse. For this reason, no attempt is made to resolve the boundary layer. Instead of the usual no-slip condition, a slip wall is specified on the inner and outer walls.

Select the Boundaries > Extension_Inner > Physics Conditions > Shear Stress Specification node.

Set the Method property to Slip.

Select the Boundaries > Extension_Outer > Physics Conditions > Shear Stress Specification node and set the Method property to Slip.

Return to CD-adapco STAR-CCM+ Index

Your Ad Here