Some questions about CFX
As illustrated by the picture,does the arrows direction of "outlet" mean the fluid flow direction or pressure direction? (if I set the "boundary type" as 'OUTLET' on the left side and its "mass and momentum" as "total static pressure:20MPa")
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And this the picture metioned above.
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I'm sorry if I didn't get the question right, but if I did...how do you want a Fluid Flow going in an another Direction than the pressure??? Meaning if the Pressure is oriented to a specific direction then the fluid flow will also be oriented that way....the fluid flowing from the high to the low pressure domain...
Or am I just not getting the question or just being stupid and forgetting my physics? ;) |
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The pressure and velocity are coupled, unless you know the velocity or pressure at the outlet it's always set as static pressure and the velocity is implicitly calculated. You may need to rephrase your question in a better way if this is not the answer you are looking for! |
I believe that in CFX-Pre, the direction shown is symbolic of the boundary condition, rather than what would actually happen for that situation.
So, for "outlet" you see an arrow going out, for "opening" - arrows towards both sides (as back flow is allowed in "opening"), for wall - no arrows and so on. Essentially, in your case, even if you specify velocity at outlet as say (u,v,w) = (0,0,-2 m/s), you still will see the arrow going out. |
another question
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Could these four fluid areas be set in one "Fluid Domain"?
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outlet velocity is calculated by the solver
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But if I only set parameters at inlet,and neglect the outlet.(And if I choose the outlet, I have to set paramerters at outlet) How would I know the situation at outlet?You know, it won't be nearly as same as the real situation. |
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