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March 14, 2024 at 10:15 pmc2087845Subscriber
I am trying to run simulations for lift and drag at different angles of attack for an aerofoil. When inputting the lift force coefficients I enter a negative number, this causes an error saying "floating point exception". However I have checked and these values are supposed to be negative. I am using the student edition so im not sure if this is a limitation of that but any help is much appreciated
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March 15, 2024 at 11:39 amRobForum Moderator
Where are you entering a negative number?Â
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March 15, 2024 at 2:01 pmc2087845Subscriber
When i enter the x component of lift, the value is negative at the angle of attack I am using
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March 15, 2024 at 2:29 pmc2087845Subscriber
for some reason it works for my initial setup and solution on fluent but not for the duplicates I am creating for different angles of attack
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March 15, 2024 at 2:33 pmRobForum Moderator
How are you adding the lift component, or do you mean the vector definition? Pictures will help.Â
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March 15, 2024 at 2:41 pm
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March 15, 2024 at 2:52 pmRobForum Moderator
That shouldn't have any effect on the solver stability, it's just to report the force components.Â
If the model is failing, check the mesh and boundary settings are suitable: the NACA airfoil has been used as a tutorial/help video in Fluent and also in the Learning content on here.Â
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March 15, 2024 at 3:04 pmc2087845Subscriber
is there a way to quikcly fix the sharp trailing edge in my aerofoil geometry as I believe this may be an isse
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March 15, 2024 at 3:29 pmRobForum Moderator
There are a couple of approaches. Trim the end to give a "blunt" trailing edge or break the geometry to extend the mesh from the trailing edge through the domain.
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- The topic ‘Negative components of lift and drag’ is closed to new replies.
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