Solving for a long geometry

Nkl · June 23, 2016, 10:50

Hello to everyone!

I am trying to solve a multi-region heat transfer problem and i am wondering how to avoid computing for a 10m long pipe. Is there a way to solve only for the initial part of the geometry and then jump to the last (where the direction of my fluid changes)?

Thanks in advance!

sahmed · June 23, 2016, 12:23

You can save some of your computational time by dividing the domain into several blocks (multi-block) and the use finer grids to the inlet and outlet with relatively coarser grids at the middle. Also you can easily run in parallel.

Nkl · June 24, 2016, 05:21

Thank you for your response. Dividing in multiple blocks and refining the bottom and top parts of the geometry is what i did at the beginning. The problem is that the simulation ended up crashing the whole time because the mesh was not uniform.

I was wondering if there's a way of skipping the computation in the middle part of my geometry and having a guess of the "inlet" values for the upper part once the bottom one is solved.

June 23, 2016, 10:50	Solving for a long geometry	#1
Nkl Member Nikola Join Date: Sep 2013 Location: Madrid, Spain Posts: 60 Rep Power: 12	Hello to everyone! I am trying to solve a multi-region heat transfer problem and i am wondering how to avoid computing for a 10m long pipe. Is there a way to solve only for the initial part of the geometry and then jump to the last (where the direction of my fluid changes)? Thanks in advance!

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June 23, 2016, 12:23		#2
sahmed Member Sheikh Ahmed Join Date: Dec 2015 Location: South Carolina, USA Posts: 88 Rep Power: 10	You can save some of your computational time by dividing the domain into several blocks (multi-block) and the use finer grids to the inlet and outlet with relatively coarser grids at the middle. Also you can easily run in parallel.

June 24, 2016, 05:21		#3
Nkl Member Nikola Join Date: Sep 2013 Location: Madrid, Spain Posts: 60 Rep Power: 12	Thank you for your response. Dividing in multiple blocks and refining the bottom and top parts of the geometry is what i did at the beginning. The problem is that the simulation ended up crashing the whole time because the mesh was not uniform. I was wondering if there's a way of skipping the computation in the middle part of my geometry and having a guess of the "inlet" values for the upper part once the bottom one is solved.