# convergence of propeller blade velocity

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

 August 21, 2013, 07:35 convergence of propeller blade velocity #1 New Member   vishal Join Date: Aug 2013 Posts: 3 Rep Power: 4 hallo everyone!! from last one month i have started working on fluent and my goal is to get convergence of propeller blade velocity.I have tried by changing controls from solver also but my solution is almost remain constant after 100 iterations and its not getting converged .so i need your help.so let me know how should i proceed now?? Thanks & Regards, Vishal

 August 21, 2013, 15:09 #2 Senior Member     A-A Azarafza Join Date: Jan 2013 Posts: 187 Rep Power: 4 Hello there If there is no problem concerning the geometry (model and mesh quality) and boundary conditions, then you need to increase the velocity gradually. For instance, if you want to run a impeller with 200 rpm, then first start with 30 rpm and increase it 20 rpm step by step and in each step, try to get a converged solution. Be careful to apply right turbulence model as well. Good luck __________________ Regard yours

 August 22, 2013, 05:08 #3 New Member   vishal Join Date: Aug 2013 Posts: 3 Rep Power: 4 hallo , Thank you for reply and so now let me try this method and if i would have any problem then will let you know, Best Regards, Dharmesh

 August 22, 2013, 05:41 #4 Senior Member   Paritosh Vasava Join Date: Oct 2012 Location: Lappeenranta, Finland Posts: 545 Rep Power: 12 Some questions: 1. What approach are you using? Moving frame of reference, dynamic mesh or something else? 2. Is your simulations steady-state or transient? 3. What makes you say 'my solution is almost remain constant after 100 iterations and its not getting converged'? Are you observing a particular quantity or Convergence graph? Few pictures from your mesh and results would also help us help you.

 August 22, 2013, 07:18 #5 New Member   vishal Join Date: Aug 2013 Posts: 3 Rep Power: 4 Hallo Vasava, Description of My task: I am working on propeller blades of helicopters and i have to get convergence of three types of blade inlet velocity and my approach is Absolute reference frame and my simulation is for steady state condition. and velocity and mass flowrate i set same in all three blades ,in one old wood blade i got convergence and in one blade after trying many times the convergence not coming near to criteria but its going up and up and in one blade convergence remain almost constant after 100 iterations ..My main goal is to get convergent solution of inlet velocity of all blades .i have checked mesh and everything and my supervisor also checked .I don't know how to take photo so tell me how can i click and send . Thank you Best regards, vishal

 Tags propeller convergence

 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 colopolo CFX 13 October 4, 2011 22:03 hasan_hzl Main CFD Forum 0 January 29, 2011 14:42 LittleBart Main CFD Forum 5 January 10, 2011 16:07 demigod FLUENT 1 October 5, 2005 08:03 Ammu FLUENT 1 July 23, 2005 13:36

All times are GMT -4. The time now is 18:22.