# Solidworks FLow Simulation - iterations??

 Register Blogs Members List Search Today's Posts Mark Forums Read

 May 15, 2012, 22:50 Solidworks FLow Simulation - iterations?? #1 New Member   shahrul Join Date: Oct 2010 Location: Malaysia Posts: 18 Rep Power: 8 Sponsored Links Hi All, I'm using solidworks to do convection heat transfer in the microcomputer. The problem is my understanding on the number of iterations. 2 simulations are done through 2 different setting on the iteration: 1) goals convergence (result obtained as in Pic 1 attached - stop at iteration 56) 2) maximum iterations = 42 (result obtained as in Pic 2 attached - stop at iteration 42) How do I explain about the differences of data ( in this case temperature) at iteration 20 and iteration 30?? For goals convergence; what is mean by goal convergence?? is it equilibrium state/ condition?? This number of iterations are not explained about time, am I right? ** for pics, please go to this post: https://forum.solidworks.com/thread/55629 Thanks

 May 15, 2012, 22:58 #2 New Member   shahrul Join Date: Oct 2010 Location: Malaysia Posts: 18 Rep Power: 8 anyone who want to contact me.. please do so through skype.. my skype id is alpharays786.. thanks

 May 16, 2012, 10:28 #3 Senior Member   Erik Join Date: Feb 2011 Location: Earth (Land portion) Posts: 659 Rep Power: 13 It was still iterating your solution, at iteration 20 and 30 you do not have true solution yet. The simulation will stop whether when you have reached you convergence criteria (residual values) or when you reach the number of max iterations. This is why I hate SolidWorks, its so easy to use that people who obviously know NOTHING at all about numerical methods can run CFD problems and make pretty pictures. sail and cdegroot like this.

May 17, 2012, 00:25
#4
Senior Member

Chris DeGroot
Join Date: Nov 2011
Posts: 388
Rep Power: 8
Quote:
 Originally Posted by evcelica It was still iterating your solution, at iteration 20 and 30 you do not have true solution yet. The simulation will stop whether when you have reached you convergence criteria (residual values) or when you reach the number of max iterations. This is why I hate SolidWorks, its so easy to use that people who obviously know NOTHING at all about numerical methods can run CFD problems and make pretty pictures.
Absolutely! In my experience it is a pretty weak CFD tool to start with, made worse by the fact that it is so easy for the inexperienced user to input garbage and obtain a "solution".

 May 22, 2012, 09:39 #5 New Member   Eugeny Join Date: Feb 2011 Location: Ukraine Posts: 9 Rep Power: 8 It's steady-state solutions with not-physical time steps (default). It is desirable to know in advance the approximate solution. Otherwise need to use time-depended solution.

 Tags flow simulation, heat transfer, iterations, simulation, solidworks

 Thread Tools Display Modes Linear Mode

 Posting Rules You may not post new threads You may not post replies You may not post attachments You may not edit your posts BB code is On Smilies are On [IMG] code is On HTML code is OffTrackbacks are On Pingbacks are On Refbacks are On Forum Rules

 Similar Threads Thread Thread Starter Forum Replies Last Post nedved OpenFOAM Running, Solving & CFD 16 March 4, 2017 09:30 cheng1988sjtu OpenFOAM Bugs 15 May 1, 2016 16:12 xiuying OpenFOAM Running, Solving & CFD 8 August 27, 2013 15:33 nedved OpenFOAM Running, Solving & CFD 1 November 25, 2008 21:21 sivakumar OpenFOAM Pre-Processing 9 September 9, 2008 12:53