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June 6, 2018, 12:43 |
Defining friction between wall and fluid
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#1 |
New Member
Join Date: Mar 2018
Posts: 24
Rep Power: 8 |
Hi guys,
my simulation contains walls which move in an environment which is filled with two different phases. When I edit the properties of the wall "shear condition", the default setting is always "no slip". However, I would like to define a certain amount of friction between the wall and the surrounding fluids. So how do I do that? Has the function "specifying shear stress" anything to do with it? Ansys manuel says the following: "In addition to the no-slip wall that is the default for viscous flows, you can model a slip wall by specifying zero or non-zero shear. For non-zero shear, the shear to be specified is the shear at the wall by the fluid." So what I do with this function, is basically defining a certain value of shear stress which is present between the wall and the surrounding fluid? I am a little bit confused at this point.. Thanks in advance for any insights on this! |
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June 6, 2018, 15:33 |
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#2 |
Senior Member
Lucky
Join Date: Apr 2011
Location: Orlando, FL USA
Posts: 5,654
Rep Power: 65 |
Yes you specify the shear. What is the confusion? The benefit of having things written down in text is that you can always go back to reread it.
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June 7, 2018, 15:48 |
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#3 |
New Member
Join Date: Mar 2018
Posts: 24
Rep Power: 8 |
Hi LuckyTran,
my simulation has two different phases in it. So wouldn´t I have to define two different shear stresses for the phases in order to define the frictional interaction between fluid 1 and fluid 2 and my wall? Or is the kind of the fluid which is surrounding the wall completely irrelevant, as the chosen shear stress would be used for any wall/fluid interaction, no matter which fluid is in contact with the wall? |
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