enrico1979
Guest
hello to all boys
They are struggling with a simulation of a venturi that I realize with cfx of ansys.
I am in difficulty in interpreting the results as I have realized various simulations from that 2d, then passing to 3d.
in particular I wanted to compare the results of 3d simulations where:
-In the first I considered the solid volume inside the venturi providing the input speed in the venturi
- in the second I created a domain (an enclosure) within which I insert my venturi and that in the setup I define as a no slip wall (in the designm of ansys , through a boolean>imprint, I picked up material at the venturi ).
now what happens and that in the second case in correspondence of the venturi filling section the speed decreases compared to the inlet speed of my enclosure rectangle, as if there was a full obstacle (a little as happens in the study of a wing profile).
However the air passes through the venutri, accelerates in correspondence of the throat section, but the result is far less than that of the first simulation as it actually depends on the rate of the fluid input in the venturi, than for the above problem, it decreases.
Can someone advise me on how to proceed and what results to believe? ? ?
place an image of the speed field to clarify how exposed
They are struggling with a simulation of a venturi that I realize with cfx of ansys.
I am in difficulty in interpreting the results as I have realized various simulations from that 2d, then passing to 3d.
in particular I wanted to compare the results of 3d simulations where:
-In the first I considered the solid volume inside the venturi providing the input speed in the venturi
- in the second I created a domain (an enclosure) within which I insert my venturi and that in the setup I define as a no slip wall (in the designm of ansys , through a boolean>imprint, I picked up material at the venturi ).
now what happens and that in the second case in correspondence of the venturi filling section the speed decreases compared to the inlet speed of my enclosure rectangle, as if there was a full obstacle (a little as happens in the study of a wing profile).
However the air passes through the venutri, accelerates in correspondence of the throat section, but the result is far less than that of the first simulation as it actually depends on the rate of the fluid input in the venturi, than for the above problem, it decreases.
Can someone advise me on how to proceed and what results to believe? ? ?
place an image of the speed field to clarify how exposed