|January 8, 2015, 17:39||
Immersed solid, vs solid-fluid interaction to determine forces on a submerged solid
Join Date: Dec 2010
Posts: 8Rep Power: 6
I've been using Ansys 13 CFX to try to determine the forces exerted on a fixed, stationary device that's inserted into a pipe with water flowing through. Up till now, I've been building the (steady-state) simulations as follows:
I've then run the simulation and used the function calculator to work out the force on the fluid-solid interface side that's in the fluid domain, which gives me a force of about 12.5N in the direction of the fluid flow. This I am taking to be the force exerted on the device due to the flow.
I've since discovered that rather than defining the device as a solid domain, I can define it as an immersed solid and perform the simulation that way. So, I've rebuilt the model as follows:
I've since run the simulation and used the function calculator to work out the force on the solid domain, but this now gives me a force of 2.5N as opposed to 12.5N
I'm not really sure which value is the correct one, or whether I'm using the right simulation method and building the simulations right.
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