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Ansys CFX - enlarged model, what speed at inlet?

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Old   April 26, 2021, 17:23
Default Ansys CFX - enlarged model, what speed at inlet?
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Marta
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Hello everybody! It's nice to be here on this forum. I want to ask my question which brought me here.

So: I set speed of 0.5 m/s on model's inlet. I had to enlarged twice my model and now I don't know what speed I should set on inlet.

Can anybody help me?
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Old   April 26, 2021, 19:27
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Originally Posted by marthass View Post
Hello everybody! It's nice to be here on this forum. I want to ask my question which brought me here.

So: I set speed of 0.5 m/s on model's inlet. I had to enlarged twice my model and now I don't know what speed I should set on inlet.

Can anybody help me?
Hello Marta,

Alright, so the principle you want to use is similarity/similitude and model testing.

You may be familiar with Buckingham's Pi Theorem, you should perform that analysis. As a refresher, or if it's your first time, please refer to this document, Example 2:
http://user.engineering.uiowa.edu/~f...11-05-2014.pdf

Please let me know if you need additional help setting up your problem/parameters.
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Old   April 28, 2021, 02:44
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Originally Posted by aero_head View Post
Hello Marta,

Alright, so the principle you want to use is similarity/similitude and model testing.

You may be familiar with Buckingham's Pi Theorem, you should perform that analysis. As a refresher, or if it's your first time, please refer to this document, Example 2:
http://user.engineering.uiowa.edu/~f...11-05-2014.pdf

Please let me know if you need additional help setting up your problem/parameters.
Hello aero_head!

Thank you very much for your help. It works properly now
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