Building mesh in fluent takes too much time to display
Hello, hope you are doing good, my system is a simple room heated from the bottom by water flowing inside pipes. after the mesh generation which also takes too much time to be generated, i go to fluent but the geometry is never displayed, i dont know why, i've been waiting for more than 6 hours now.
any help please and thank you
Answers
What is your cell count? What is RAM of your machine?
Where did you create mesh? Ansys Meshing or Fluent Meshing?
What is min orthogonal quality of the mesh? Is it tetra, hex or poly?
Are you reading in serial or parallel mode? Is any other process going on your machine?
I assume it is 3D.
Please make sure that you have sufficient RAM. It depends on case to case but generally you can assume 1GB for 1M cells to read in.
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Regards,
Keyur
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@kkanade yes sir i have a gamer machien 24 G RAM xeon CPU, just ansys fluent that i'm working with on my machine the minimal orthogonal quality is 0.1 (Shown in fuelnt mesh) but at first when i go to fluent the geometry displays byt when cheking the quality the skewness it too high which is not good for the simulation. so i go back to mesh file and try to do high quality meshing, the when i go to fluent the geometry dosen't display i dont now way, moreover the mesh generation takes too much time. i'can send you my geometry if you want so, sir.
thank you
What do you mean it does not display? How are you displaying the mesh?
@DrAmine i mean sir, that in the fluent interface the geometry is not loaded, it stops at building mesh... i've been waiting for more than 6 hours the fluent file didnt load to start the simulation
Can you load the mesh in Fluent Meshing?
@DrAmine yes sir, it's loaded by with bad quality, after going to fluent it display but as the quality is bad the simulation will have troubles to convearge so try to enhance the mesh quality the mesh genartion takes too much time, but after the generationa nd when going to the fluent file (configuration) the mesh dosent display
As Ansys Staff I do not look into attachements. Insert the images instead.
So you can load the mesh but you cannot display it in Fluent? If you are loading the mesh in Fluent, and you go to check it what is printed in the console?
or add a screenshot of the Fluent console once you are loading the mesh.
@DrAmine in the fluent what is writting is building mesh and it stays like
moreover sir the mesh generation takes too much time over 2 hours i dont know why.
thank you sir
I do not understand: what is the issue here? Is it related to Meshing taking a long time to create the mesh or to Fluent not able to loade the mesh?
@dramine both sir, when try to do high quality mesh it takes too much time more then 2 hours, moreover when going to fluent it dosent load.
because when i genereate a low mesh quality it loads. i dont know why
@DrAmine if you want sir i can send you the file. thank you
Check what cell size you're using for the finer mesh, you could be overloading the memory or have too many conflicting settings. Please update to 2020 and try there as the Meshing software has seen some fairly major changes.
@Rob elements number goes over 34M which maybe righ cuz my geometry is a room of 5m x 2m x 1.5m in the floor of the room there are imbended pipes inside the concrete floor, under the concrete floor there is insulation the followed by a slab.
here are the dimmension of the
pipe: interior radius 0.016m external radius 0.018
insulation: 0.02M
slab: 0.2M
the mesh is taking too much time, i use tetrahedrons methode for mesh generation with surface sizing.
thank you sir
You may want to review the meshing methods and use non-conformal mesh. What are you trying to prove with the model?
I'm trying to evaluate the heat transfert from the floor to the air within the room. i've tryed it but the same problem. i can send you the file sir if you want to. and thank you sir
here is the generated mesh after 2 hours
34 M Cells = Loading it in double precision Fluent will require at least 68 GB of memory.