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why do we have to add a dynamic viscosity to a type of solid material

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Hi. When I add a solid material, it reminds me to add a dynamic viscosity to the material. It makes me feel confused as I think that a solid material does not have such a property .
Can someone help me solve this problem?
Thank you.

4 Replies Last Post 4 juin 2017, 17:26 UTC−4
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Hello Min Liu

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Posted: 9 years ago 11 sept. 2015, 11:05 UTC−4
same problem here...for aluminium selection, i was forced to give a value to dynamic viscosity...dont know what to do
same problem here...for aluminium selection, i was forced to give a value to dynamic viscosity...dont know what to do

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Posted: 9 years ago 11 sept. 2015, 11:08 UTC−4
same problem here :(
same problem here :(

Jeff Hiller COMSOL Employee

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Posted: 9 years ago 11 sept. 2015, 11:23 UTC−4
Make sure to turn off the fluid flow physics in the domain where you don't want it solved.
Jeff
Make sure to turn off the fluid flow physics in the domain where you don't want it solved. Jeff

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Posted: 7 years ago 4 juin 2017, 17:26 UTC−4
While I am doing the simulation of a fingertip which is touching a flat surface and when it is moving, so you mean I need to add the dynamic viscosity of the skin so that I will have a feeling how the skin is connected to the surface when it is moving?
While I am doing the simulation of a fingertip which is touching a flat surface and when it is moving, so you mean I need to add the dynamic viscosity of the skin so that I will have a feeling how the skin is connected to the surface when it is moving?

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