Specify an endTime that isn't a multiple of timestep

hertzsprung · August 3, 2017, 06:22

I need to obtain a solution at a particular simulated time, but I also need to use a timestep that does not divide exactly into endTime. For example, endTime=10s, timestep=3s. I'd like to have solves at t=3s, t=6s, t=9s then, using a timestep=1s, obtain the final solution at t=10s.

Can I configure this in the controlDict and obtain a solution in a single run?

Joshua14 · August 3, 2017, 11:24

You should be fine with an endTime of 10s and a writeTime of 3s as it should automatically write at endTime regardless of writeTime.

I suggest making a small test case that runs in a matter of seconds to test this with your version of OF.

Joshua

hertzsprung · August 4, 2017, 05:18

Quote:

Originally Posted by Joshua14

You should be fine with an endTime of 10s and a writeTime of 3s as it should automatically write at endTime regardless of writeTime.

I suggest making a small test case that runs in a matter of seconds to test this with your version of OF.

I've tried with a small scalarTransportFoam case, https://github.com/hertzsprung/openfoamEndTime. It outputs 3,6 and 9 directories only.

August 3, 2017, 06:22	Specify an endTime that isn't a multiple of timestep	#1
hertzsprung New Member James Shaw Join Date: May 2014 Posts: 8 Rep Power: 12	I need to obtain a solution at a particular simulated time, but I also need to use a timestep that does not divide exactly into endTime. For example, endTime=10s, timestep=3s. I'd like to have solves at t=3s, t=6s, t=9s then, using a timestep=1s, obtain the final solution at t=10s. Can I configure this in the controlDict and obtain a solution in a single run?

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
how to set periodic boundary conditions	Ganesh	FLUENT	15	November 18, 2020 07:09
error with smaller timestep ?	Thomas MADELEINE	FLUENT	0	August 8, 2016 14:02
[OpenFOAM.org] Install openFOAM 3.0.1 in Ubuntu 16.04 LTS from Deb packs	Pier84	OpenFOAM Installation	4	June 18, 2016 17:22
obtaining transient results from multiple timestep files	suyesh	FLUENT	1	May 13, 2016 10:52
OpenFOAM static build on Cray XT5	asaijo	OpenFOAM Installation	9	April 6, 2011 13:21

August 3, 2017, 11:24		#2
Joshua14 Member Joshua Join Date: Dec 2016 Location: St. Louis, Missouri Posts: 91 Rep Power: 10	You should be fine with an endTime of 10s and a writeTime of 3s as it should automatically write at endTime regardless of writeTime. I suggest making a small test case that runs in a matter of seconds to test this with your version of OF. Joshua