|
[Sponsors] |
April 9, 2019, 09:02 |
pimpleDyMFoam+Forces+propeller
|
#1 |
New Member
Amir-hossein Mokhtari
Join Date: Mar 2015
Posts: 13
Rep Power: 11 |
I changed propeller then The amount of force increases and time step
Decrease. what is the problem? (pimpledymfoam) Thanks in advance! amir |
|
April 9, 2019, 14:43 |
|
#2 |
New Member
Amir-hossein Mokhtari
Join Date: Mar 2015
Posts: 13
Rep Power: 11 |
what is it?????!!!!!
FOAM FATAL ERROR: problem. fineFacei:773375 rmUpperAddr:95750 rmLowerAddr:95800 coarseFacei:475991 cOwn:95749 cNei:101113 |
|
April 11, 2019, 00:07 |
pimpleDyMFoam+Forces+propeller
|
#3 |
New Member
Amir-hossein Mokhtari
Join Date: Mar 2015
Posts: 13
Rep Power: 11 |
Hi everyone,
I run pimpleDyMFoam on the propeller. my problem: forces is changing a lot!!!! sum of forces: pressure : (-517.436 53.6559 127.746) viscous : (1.77798 -1.50944e-05 -0.110839) porous : (0 0 0) sum of moments: pressure : (17.4725 20.9064 36.9176) viscous : (0.319184 0.0019686 0.00749538) porous : (0 0 0) *************************************then********* sum of forces: pressure : (-1063.02 -52.2147 -154.645) viscous : (1.68729 -0.0743521 -0.111804) porous : (0 0 0) sum of moments: pressure : (40.1869 -21.4997 -45.6158) viscous : (0.321284 -0.00163251 -0.00125835) porous : (0 0 0) after 0.8 s converge!! Where can the problem be? Best regards,Amir. |
|
April 11, 2019, 17:04 |
|
#4 |
Retired Super Moderator
Bruno Santos
Join Date: Mar 2009
Location: Lisbon, Portugal
Posts: 10,975
Blog Entries: 45
Rep Power: 128 |
Quick answer: I came looking for posts you've made, after receiving the private message you sent me.
In that PM you gave this error code: Code:
FOAM FATAL ERROR: problem. fineFacei:1249261 rmUpperAddr:201918 rmLowerAddr:196483 coarseFacei:776771 cOwn:196483 cNei:201916 From function GAMGAgglomeration::agglomerateLduAddressing(..) in file matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomerateLduAddressing.C at line 235. As for the different values of forces, if you changed the propeller geometry, then it's only natural that it works differently. You need to look at the pressure fields and velocity fields and see for yourself what is happening on both cases.
__________________
|
|
April 12, 2019, 08:01 |
|
#5 |
New Member
Amir-hossein Mokhtari
Join Date: Mar 2015
Posts: 13
Rep Power: 11 |
hi Bruno.
thank you for reply. *yes I changed the propeller geometry and Change the direction of the face propeller. you mean force's (very big) Fluctuate is normal? I guess my pressure fields and velocity field are Runge. what should I do? solidBodyMotionFunctions::rotatingMotion::transfor mation(): Time = 0.00957262 transformation: ((0 0 0) (0.730372 (-0.683049 0 0))) AMI: Creating addressing and weights between 5984 source faces and 5676 target faces AMI: Patch source sum(weights) min/max/average = 0.982639, 1.07129, 1.00011 AMI: Patch target sum(weights) min/max/average = 0.954482, 1.11492, 1.00021 PIMPLE: iteration 1 smoothSolver: Solving for Ux, Initial residual = 2.87215e-05, Final residual = 3.83925e-07, No Iterations 2 smoothSolver: Solving for Uy, Initial residual = 0.00521045, Final residual = 1.6072e-07, No Iterations 5 smoothSolver: Solving for Uz, Initial residual = 0.0040226, Final residual = 8.4076e-07, No Iterations 4 --> FOAM FATAL ERROR: problem. fineFacei:494861 rmUpperAddr:190038 rmLowerAddr:73651 coarseFacei:425481 cOwn:73716 cNei:190038 From function GAMGAgglomeration::agglomerateLduAddressing(..) in file matrices/lduMatrix/solvers/GAMG/GAMGAgglomerations/GAMGAgglomeration/GAMGAgglomerateLduAddressing.C at line 235. FOAM exiting thank you ... Last edited by wyldckat; April 21, 2019 at 07:49. Reason: removed broken atachment link |
|
April 16, 2019, 17:50 |
|
#6 |
Member
sajad alimardani
Join Date: Feb 2018
Posts: 31
Rep Power: 8 |
hi
check your ami cylinder.I think that is problem.meybe surface mesh not good or that is not accurate(short). Best regards |
|
April 17, 2019, 04:31 |
|
#7 |
New Member
Amir-hossein Mokhtari
Join Date: Mar 2015
Posts: 13
Rep Power: 11 |
hi sajjad
you are right. cylinder geometry Had a problem. I apologize for all thanx |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
Anybody tried modelling your own propeller and running with pimpleDyMFoam? | zhi | OpenFOAM Running, Solving & CFD | 2 | October 19, 2018 06:33 |
Residuals and forces spiraling out of control before failing | edomalley1 | OpenFOAM Running, Solving & CFD | 3 | September 7, 2018 10:42 |
OpenFOAM parallel on VM? pimpleDyMFoam propeller tutorial has been running for hours. | MBttR | OpenFOAM Running, Solving & CFD | 0 | June 13, 2016 10:58 |
Propeller Forces CFX | newcon | CFX | 15 | July 6, 2015 07:13 |
pimpleDyMFoam: When restarting a case, large spike in forces | pbachant | OpenFOAM Running, Solving & CFD | 4 | March 1, 2014 06:43 |