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Old   January 6, 2018, 17:35
Default Few questions..
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Fox
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I am doing a science project on determining which type of grid fin is ideal for a rocket landing (Grid Fin is a control device similar to a planar fin but is better).

In this case, I would like to know if CFD has the capability to tell me the total force on the grid fin due to the air stream and if it can tell me the total moment of the grid fin due to the air stream.

Thanks
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Old   January 7, 2018, 07:47
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Hi,
Sure!!!
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Old   January 7, 2018, 10:43
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Quote:
Originally Posted by AliE View Post
Hi,
Sure!!!
Perhaps I should have specified. My bad.

I know the wall calculator can calculate torque/force but the problem is, is that I don't know what to select on the model to calculate it.

If I wanted to find the total force on the grid fin itself, do I select the underside and topside of the grid fin only? https://imgur.com/a/xUMOh

What should I select when I want to find the torque on the grid fin? The fin obviously, but do I select the hinge and rocket body? https://imgur.com/a/43HH9
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Old   February 2, 2018, 05:15
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Just select the surfaces that you need to include. We cannot really answer which ones for you, that is for you to decide

But yes, just use the wall calculator.
Be mindful of the mesh quality in models like this...
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Old   March 19, 2018, 19:42
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Carlos Rivera
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CFD stands for Contract for Difference. As the name implies, a Contract for Differences is a contract whereby two parties agree to exchange the difference between the entry price and the exit price of the underlying asset on which the CFD has been established.

It is important to understand that when you trade with CFDs you do not buy or sell the underlying asset. When operating with CFDs you are assuming a position on the future direction in which the price of said asset will move:There are CFDs for cryptocurrencies and stocks. You only need to look at the forex live calendar and be aware of when to invest.

If you think that the price of the underlying asset will move higher, then you will open a long position, buying CFDs and obtain a profit proportional to the appreciation of the price of the asset, from the time of purchase of the CFD until the moment of closing the transaction .
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Old   September 19, 2018, 03:11
Default same problem
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yes use that just calculator
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