- **FLUENT**
(*https://www.cfd-online.com/Forums/fluent/*)

- - **calculating shear rate**
(*https://www.cfd-online.com/Forums/fluent/106193-calculating-shear-rate.html*)

calculating shear rateHi
Haw can i calculate shear rate in cfd-post, or in fluent,? and what is the meaning of velocity u.gradient y ? thanks so much |

you can find it in fluent via contours ... -> derivatives ... -> strain rate
velocity dot gradient y = velocity component in y-direction |

thank you so much, yes it works, .. however I am wondering if still I can use "velocity u.gradient y" as "dUx/dy" in CFD-Post, if so, would you please let me know why the unit does not pop up in drop down menu in cfd-post for "velocity u.gradient y"
Thank you again |

Sorry, I thought you were asking an mathematical expression $u\cdot\nabla y$ which results in the y-component of velocity. In CFD-Post, "velocity u.gradient y" is a CEL expression and represents "dUx/dy", as you have mentioned.
You should click the ellipsis (..., indicating more variables) beside the drop-down list to get this variable. |

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