Hi guys,
I'm in a bit of a messy situation.
I have a long simulation running (been running for 18hrs +) and did not use restart or write restart command.
I specified a mass of 290 kgs of particles to be input (loose packing) and it is currently only at 88 kgs (after 18 hours, current timestep 1600 out of 2850).
There's warnings of less particles being inserted and its not going to reach 290 mass for sure (hardly inserting any more mass).
I was wondering if I should just abort the simulation. I am in a huge dilemma.
What should I do?
- Should I abort the simulation because it wont reach the desired mass so its useless anyway?
- Let it keep running and see what happens?
Also, for next time is it highly necessary to use a restart or write restart command? Since i want to continue simulating and use a moving mesh.
Thank you very much, any help is much appreciated.
Kevin
| Attachment | Size |
|---|---|
 Input deck | 2.62 KB |
cstoltz | Wed, 05/20/2015 - 15:59
Kevin,
Kevin,
Was the simulation inserting particles properly at the beginning, or have you been getting the warnings about particle insertion from the start?
If the simulation started by inserting correctly, it sounds like you have a case where your particles are filling up the region where you're trying to insert particles and blocking the creation of new particles.
If the simulation was having problems inserting properly from the start, sounds more like you need to either slow down the insertion rate, increase the initial velocity of the particles, or make a larger insertion region.
It's a good idea to have your code create some checkpoints periodically in case you need to crash it, and I like to produce visuals as they aid in debugging.
Regards,
Chris
kevin.eipe | Thu, 05/21/2015 - 17:03
Thanks for your reply Chris.
Thanks for your reply Chris. The particles were inserting correctly at the beginning. But after a certain point in the simulation, the warnings popped up.
I ended up aborting the process because it was going to take many more hours, maybe even days. I did not realise how some 3D simulations can take very long computational time.
I learnt later to run in steps and not run a huge amount of timesteps in one go.
Thanks again for the advice.
Kevin