Recent content by epd20

Hi all, I have to start again a new thread to ask you if you could help me solve this problem. -------------------------------------------- MAT 2 d=100 nm PLANE82 -------------------------------------------- MAT 1 d=1 micron PLANE82...

Thanks Harry, I've done with the merging only; but first I had to mesh carefully the two volumes, to make sure the nodes of the upper one were coincidents with the ones of the lower one. Now all the model works. Thanks again. Emile http://www.master-nanotech.com/ http://www.polito.it/

http://h21007.www2.hp.com/dspp/tech/tech_TechDocumentDetailPage_IDX/1,1701,7173,00.html ...sorry, I don't know if there are "trial versions" available... but I don't think so. [bluegreedy] PS From 31/12/2005 it will be Intel Fortran.. Hope this helps Emile http://www.master-nanotech.com/...

Ok thanks. But then how can I define different material properites? I used to do that by the MAT command just beforethe meshing of each solid separately.. Hope I'm not abusing too much of your time. Thanks Emile http://www.master-nanotech.com/ http://www.polito.it/

Hi all, as in my previous post: -------------------- Nickel (SOLID69) -------------------- Air (SOLID70) 20 microns -------------------- Silicon (SOLID70) Substrate @ fixed Temp -------------------- For a thermal analysis in which the Nickel is heated up to a certain temp by an...

Hi Harry thanks a lot for your very fast response! Well, I was thinking exactly like you do, but the Lab team told me that they (in some way, don't ask me how) know (!!) that conduction via air is the principal thermal transfer phenomenon, convection being only a small 10% of the overall...

Hi and thanks everybody, Drej: the structure seems meshed, and no problem was encountered. Alex: thanks also for the moral support [thumbsup] Thanks guys Emile http://www.master-nanotech.com/ http://www.polito.it/

Hi again. While trying to modify my model like you suggested me, I had a doubt. The fact is that the equivalent heat transfer coefficient has the dimensions of a convection coefficient (W/m2 K), hasn't it? So, do I have to put it like a convection, with the CONV command, or like a layer with...

Hi Drej, thanks for the reply. But: I can't understand what you're telling me. What should I do once that I know the results of these commands? And what do you mean by "check"? The commands you wrote down gave as results e.g. one keypoint, 3 lines etc. but what's the purpose? My main question...

Hi, when trying to merge more different "blocks" created with solid generation procedure, the command NUMMRG,ALL,1e-9 produces the following warning: I know it's just a warning and not an error ;-) but what does this means [ponder] Will my model behave like a single entity when I'll apply...

Hi, that's the problem, I'm trying to get the same deflection measured in Lab with my simulations...[morning] With your help I should succeed. All I have to do is to adjust the parameters. Thanks a lot! Emile

Hi, Thanks for your reply and excuse me for the delay. I just don't have yet specification about the exact gap between my structure nad the substrate, so I will see later on. One more question about your post: you meant 13.5 W/(m^2 K) if the gap was 2 um, didn't you? Sorry for the silly...

Hi, I have some problems in modeling the heat transfer of a standing beam (MEMS), which being thermal actuated involves temperature analysis. I've already made heat transfer by convection, using the specified command, but I don't see how to make the heat transfer by conduction to the substrate...