Why is my simulation not converging?
 

Hi Ansy’s Community!
I’m having issues with my simulation converging when I run calculations. I am trying to find the drag and lift coefficients as well as base overturning and hinge moments for my university project (wind incidence effect on parabolic trough). Im new to Ansy’s fluent and I am self-learning which I must admit is proving to be quite difficult. Please could someone assist me in where im going wrong or what I could do to run a successful simulation? I have attached screenshots of my geometry, mesh and simulation. Another question I had is would I consider the highlighted results as my coefficients once the calculations had converged?


For reference my mesh element sizes are:
Body of influence- 1m
Refined area- 0.5m
Edge- 0.1m


Thanks in Advance, any help would be greatly appreciated!

Hi

One question, why do you have this huge outside box? What is the purpose of this box? And inside the box you have the smaller box with the relevant geometry as far as I can see.

The relevant part is obvious the one in the smaller box. Does this part does have any boundary layers? Did the fluid even reach the part inside the box? By looking at the mesh I would say no.

Btw. you should update your driver for your graphic board, that's why the "GL" in red is on the second picture.

And, why don't you use the fluent mesher?

Kind Regards