Learning Forum

[Wallace]

So i am currently trying to make CFD analysis for my heat exchanger model but when i try to initalize i am getting Floating object exception and Error object: #f errors on FLUENT. I am posting the screenshots about my work including named selections of model. By the way i need to say that i had to delete contact regions because i was getting contact region errors. I need to complete my analysis as soon as possible so i will be very happy if i can solve this issue. Thanks.

 

[Wallace]

I need to add something. When i enabled adaptive meshing i was able to get results and did not get any errors. But when i enable adaptive meshing my cylindirical tubes becomes hexagonal. I also tried body sizing for mesh while adaptive meshing was enabled but i got floating point excpetion error again. I will be pretty happy if you can help me.

 

Btw i changed my named selections and they look like this right now.

 

These are how my results looking when adaptive meshing is enabled(hexagonal tubes) for 20 and 50 celsius inlets.

[Karthik Remella]

Hello Wallace,

It is likely that you are dealing with a mesh quality issue. Based on the screenshots you've provided, it seems like you have a poor mesh (min orthogonal quality < 0.1 and Max skewness > 0.9). I'd strongly recommend that you improve your mesh quality before you run your simulation. The floating-point error you are seeing is because Fluent is unable to converge your solution.

Thanks.

Best,

Karthik