Learning Forum

[info]

🛈 This post originally contained file attachments which have been removed in compliance with the updated Ansys Learning Forum Terms & Conditions

Hello, Our customer is looking to identify pressure drop in a piping system connected to a suction pump. Question #1 : If we consider that the pump is located on the right side, should we put an input at 0pa on the left side and the “suction” speed at the output to get correct fluid flow conditions? Question #2 : How can we measure the pressure drop on specific area of the fluid volume? Can we cut the fluid volume body and place calculators? Here is an example with two simulation tests : Simulation 1: only the external bodies where conditions are applied are considered during the simulation. Simulation 2: with free slip walls : it seems to work but calculator is equal to 0. Thank you in advance for your help.  

[Subashni Ravichandran]

Hello GUICAD

1. I'm not sure if that will be a correct approximation. Although let me discuss this with my team and get back to you on this.
2. Currently, there is no way to add monitors to cross-section areas, except for the inlet/outlet. Cutting the Fluid volume to place a monitor on the cut face may give inaccurate results as already seen in your case. We thank you for sharing your feedback. We will share your idea/input with the product development team.

[info]

Hello Subashni,

Any news concerning fluid flow conditions of the pump ?

Thanks,

[Subashni Ravichandran]

Hello GUICAD

I apologise for the delayed response. By specifying the Pressure at Outlet you are specifying only the Static pressure. The inlet pressure condition specifies the Total pressure. You can specify the mass flow rate at either inlet or the outlet and it should have the same effect.

If at the initial condition if the pump is filled with fluid, you should not have any issue getting the predicted results. Although if the pump is filled with air, you will need to simulate the problem in a multiphase flow which is beyond the capabilities of Discovery.

Please let me know if you face any discrepancies in the results. WE can investigate the problem further