Originally Posted by cramr5 (Post 839032)

Hi,

There is a Tutorial about a GPU Cooling with a Fan and GPU heat generation.
Also, There is on Youtube a long video of someone doing a doublel CPU Cooling. https://www.youtube.com/watch?v=LCUr2AMqrT0

All the things you mention from radiation, turbulence, fan models, etc etc are possible to do with STAR-CCM+

Originally Posted by cramr5 (Post 839173)

StarCCM+ is a very powerful tool that can be used for many things both in Academia and/or Top Level Industry .

Of course, as most of this tools, the validity of the results you get is proportional to the reliability of your input data.

Going back to you initial questions, Can STARCCM+ do...

- complex 3D geometry, needing "cleaning" before meshing: Yes
- geometry manupulations (moving, copying, boolean, deleting): Yes
- cooling fan models: Yes
- thermal joints: Yes
- perforated plates/porous medium: Yes
- turbulent flows: Yes
- radiation: Yes


Are there tutorial video(s) or tutorial pdf files to see:

a)how difficult is to build an electronic cooling model: Difficulty will be highly dependant and you input data/files

b)solver's performance and accuracy: As accurate as you input model / data is

Originally Posted by CFDfan (Post 839226)

Thank you. I assume by default that the input data is correct thus this variable should be excluded from the equation. The main problem of the 3D electronic cooling model is the large number of essential components (hundreds or more) with large variety of shapes. The essential means they all generate power loss and should be accounted for. The complex 3D model creates issues with geometry cleaning, meshing and leads to possible solver issues.

Originally Posted by cramr5 (Post 839482)

I have just seen that Siemens has also a Software on SIMCENTRE called "Flotherm" That seems to be targeted towards Electronics cooling.
https://www.plm.automation.siemens.c.../flotherm.html

Originally Posted by cwl (Post 840660)

It works fine. Name any possible reason - why it wouldn't be good for electronic cooling.

Originally Posted by cwl (Post 840660)

It works fine. Name any possible reason - why it wouldn't be good for electronic cooling.

Originally Posted by CFDfan (Post 840803)

Your question is "why not" ...

Originally Posted by CFDfan (Post 840803)

... while I was looking for the opinion of a satisfied/unsatisfied user working with starccm in this application area.

Originally Posted by CFDfan (Post 840803)

My concerns are related to cleaning and successfully meshing complex geometries with hundreds of (essential) solids, having various shapes and sizes

Originally Posted by CFDfan (Post 840803)

as well as to solver convergence when dealing with hundreds of heat sources, simultaneous external and internal flows/heat transfer, simultaneous gas and liquid cooling, porosities, fans and a few other specifics related to electronic cooling.

Originally Posted by cwl (Post 840820)

Your initial question wasn't any bit specific either :D



I'm both - satisfied and unsatisfied :D



Working with geometry is possible in Star-CCM+, but it is a nightmare and 3D-CAD module in Star looks like an autistic child with Down syndrome and development delay of about 20 years.

So basically I (and its not just my opinion) would say - time spent on working on 3D model in Star should be reduced to as little as possible.
Personally I clean geometry with SpaceClaim, although it would be more handy to use NX (there is a live-link between, thus no need for export/import in neutral formats) or Solid Edge (still waiting for live-link to it in Star).



Everything mentioned starting and including meshing works very well.

The thing is that Star as a tool is pretty much sophisticated and customizable if you dig deep - and the deeper you dig the more possibilities and features you find.

In some ways Star is like a "To build a house you have first to collect some clay and fire the bricks" - some basic things have to be implemented manually, but again - the flexibility is great, giving you an opportunity not just "to build a house" but also to "mine some iron and uranium ore and to build the nuclear reactor next to your brick house".
There is also a way to automate it with macros.