FAQs on Drone Simulation

cjquijano · October 16, 2015, 5:27am

Hello,

This class is free and if you have a free account you get unlimited use of the software for the length of the class.

I am a paid user with about 500 core hours left and one run of the first part of homework 1 took almost 20 core hours. I can see this class using most of the core hours I have left. Are the hours I use in this class coming out of the hours I purchased or will I be credited back the hours I using for this workshop?

Thanks,
Christopher

Milad_Mafi · October 17, 2015, 1:53am

Hi Christopher,

your account should be updated to 1000 core hours. When did you register for the workshop? If there are still any problems please send me an email (mmafi@simscale.com)

Cheers,

Milad

jousefm · October 17, 2015, 7:17pm

Hi @Milad_Mafi ,

am I allowed to run multiple simulations simultaneously? Like running 525,1050, 1575 and 2100 rad/s at the same time.
Just curious. Did not try it so far but just wanted to know for later on.

Thanks,

Jousef

Milad_Mafi · October 17, 2015, 10:39pm

Jousef my Friend

For sure you are allowed to run multiple simulations simultaneously! That’s by the way one of the big benefits of using SimScale. Unlimited computing ressourced whenever you need them

Have a nice weekend!

Cheers,

Milad

jousefm · October 17, 2015, 10:54pm

Thank you @Milad_Mafi

Tried it 2 hours ago. Awesome feature!

Have a nice weekend too!

Cheers,

Jousef

jousefm · October 19, 2015, 7:07pm

Hi @nikuradse ,

refering to your post u did about your forces (https://www.simscale.com/forum/t/step-by-step-tutorial-homework-of-session-1-level-1/297/2) I will show you my results.

P.S.: Maybe you can share your link with the community then I will have a look at it.

Cheers mate!

gurav_harsh · October 19, 2015, 8:32pm

Are there any experimental results available for validating the results we are getting through this simulation?

Milad_Mafi · October 19, 2015, 8:53pm

Hello Gurav,

not for this case but we made a lot of validation projects in the past.

My colleague @Ali_Arafat made for example a simulation of a valve with the same solver (OpenFOAM) which was validated with experimental results. It is really amazing:

https://www.simscale.com/blog/2015/09/validation-case-highlights-butterfly-valve/

Cheers,

Milad

gurav_harsh · October 20, 2015, 1:30am

While doing task 2 meshing, I am getting messages in event log like - “Illegal triangles were found…”, “The tesselated surface is not closed…”
Will this affect the mesh quality?

jousefm · October 20, 2015, 2:39am

Hey @gurav_harsh ,

did you try meshing it a second time? Because I did not get any errors while meshing. Maybe give it another try and see what it does.

Good luck!

Jousef

nikuradse · October 20, 2015, 5:08am

Hi @jousefm

Here’s the public link to that project: https://platform.simscale.com/?publiclink=b30ef4be-6014-4481-88b3-c64fd57ee87d

It has three simulations as I thought that it may vary with the iteration but it didn’t.

I have just read from @Milad_Mafi that it may be an issue with the boundary conditions so i’ll check them out again and the whole thing as well.

Thanks a lot for the help!

Cheers

Milad_Mafi · October 20, 2015, 5:45am

Hey Gurav,

don’t care about this event log. As long as you are uploading a STEP/IGES file the tessellated surface should be fine.

Cheers,

MIlad

gurav_harsh · October 20, 2015, 9:09pm

Having error while adding boundary conditions.

gholami · October 20, 2015, 11:39pm

@gurav_harsh,

could you clear your web browser’s cache and try again? The error should then disappear!

Babak

DMajstorovic · October 21, 2015, 1:39am

Is it ok to stop the simulation process once we reach satisfying parameter convergence (in order to reduce core usage)? Thanks

Maciek · October 21, 2015, 2:28am

Yes, that’s perfectly fine. This is also the reason why you should keep an eye on your simulation and don’t leave it on its own. Set higher Maximum runtime and control convergence. Then, when you decide it reached expected level simply stop the run.

jousefm · October 21, 2015, 2:45am

Hey guys and hi @nikuradse ,

did you solve your problem so far? Just came home so I could not answer as fast as always

Cheers mate!

srosendal · October 21, 2015, 2:59pm

Hi there, thank you for very nice tutorial so far

After uploading homework to the site I did not receive any receipts or confirmations. I guess it currently is supposed to be so, but I suggest that the site would create an autogenerated mail or something like that. I mean, just to make sure that the homework has been received

Thanks

nikuradse · October 21, 2015, 4:51pm

Hey there @jousefm

Nope, I checked the boundary conditions as well as the whole thing. Corrected the third decimal in the rotation center wich appears on one screencap but not on the text, and still the same results.

I think that I looked at this for too long and I can’t see the forest for the trees, so I hope the rest of the homework are okey.

Thanks for the help anyway!

Milad_Mafi · October 21, 2015, 5:13pm

Hey,

we just implemented a confirmation email

Cheers,

Milad