wall shear stress与fluid shear stress是一回事吗？

jinglina

如题，请教各位前辈，最近看国外文献提到这两个词，在用CFD计算时常提到wall shear stress, 但是用FSI计算时提到fluid shear stress，有些迷惑，他俩是等同的吗？非常感谢！
流固耦合能用来计算wall shear stress吗？

[ 本帖最后由 jinglina 于 2011-9-21 10:03 编辑 ]

jinglina

求解！

flowinflow

原帖由 jinglina 于 2011-9-21 09:58 发表

                               
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如题，请教各位前辈，最近看国外文献提到这两个词，在用CFD计算时常提到wall shear stress, 但是用FSI计算时提到fluid shear stress，有些迷惑，他俩是等同的吗？非常感谢！
流固耦合能用来计算wall shear stress吗 ...

they are different terminologies for the same thing. FSI people tend to use fluid shear stress, because they have both solid and fluid, so they use this to emphasize that it's the fluid part.

wall shear stress is continuous on solid/fluid interface, so yes, it can always be calculated in CFD. in FSI, it's calculated from the fluid part, normally.