Learning Forum

[jinnquan]

[peteroznewman]

nHi Gary,nThe solver is complaining that there is not enough RAM to solve the model, which is quite large at 2.3M nodes.nHow much RAM is in your system? Look up the maximum RAM capacity for that make and model of computer and install the maximum if you can.nDoes the solver run on small models of < 1000 nodes?nIt looks like the model includes a thin body on top of a thick body. Does the thin body have a constant wall thickness? If so, a much smaller node count could be had by creating a midsurface of the thin body and meshing that with shell elements. Slicing the thick body up so it can be meshed with Hex elements will also decrease the number of nodes and elements.n

[jinnquan]

Hi Peteroznewman,nThank you for your reply. Yes, this is actually a huge model. nI have 8GB of RAM on my laptop. How am I able to increase the RAM capacity or adjust it to maximum?nHow do I know if it runs on small models of < 1000 nodes?nYou are right, model do includes a thin body with a constant thickness. And I understand that there are different mesh shape to use to change number of nodes and elements. So, you mean I can mesh the thin body and thick body with different mesh shapes? To decrease the number of nodes and elements.nBut you mentioned shell elements, what is that?nRegards,nGarynn

[peteroznewman]

nHi Gary,nLook up the manufacturer's specifications for your laptop make and model. That will state the maximum RAM capacity. If it says that the motherboard has two slots that can hold a maximum of 32 GB, then you acquire two 16 GB RAM cards, discard the installed RAM cards and plug in the two new cards to get 32 GB of RAM. But maybe it says the maximum is 16 GB or maybe 8 GB is the maximum. You have to look that up.nSuppress the thick body and solve the model with just the thin body. Does it solve?nWith ANSYS 18.2, you might have access to DesignModeler. If you open your geometry in DesignModeler, you can create a midsurface from the thin solid body. Or if you are using some other CAD system, create a surface on the centerplane of the thin body and delete the thin body. When you bring that surface geometry into Meshing, the surface will be assigned a thickness and the surface will be meshed with shell elements.n

[jinnquan]

Hi Peteroznewman,nFrom what I manage to find out, I believe my laptop is already running at it's full capacity at 8GB (that's so little).nYes, I suppressed the thick body and mechanical can solve for the result. But, isn't it an inaccurate result? nI'm using ANSYS 18.2 and I apologize, I do not really understand what you mean by creating a mid-surface and deleting off some parts. What I can kind of understand is you meant to delete some parts to make the model smaller, but, won't it also achieve an inaccurate result too? I have already used the symmetry function in DesignModeler to make my model to this size. It was actually a even much bigger model. nRegards,nGaryn