Gradient-Based Optimization in OpenFOAM

april0100 · October 5, 2012, 10:43

Dear OpenFOAMers,

I'm looking for a gradient-based optimization algorithm that can easily be integrated into OpenFOAM. My initial searches have turned up a couple of possibilities but I would like very much to hear from other OpenFOAM users who have successfully implemented one of these packages in their code. Thanks!

April

yzf1215 · December 18, 2012, 23:32

I‘m doing the same work as you might have done. I'm also looking for a gradient-based optimization algorithm that can easily be integrated into OpenFOAM. Would you please give me some help?
My email address is yzf1215@gmail.com

nimasam · December 19, 2012, 02:18

Quote:

Originally Posted by april0100

Dear OpenFOAMers,

I'm looking for a gradient-based optimization algorithm that can easily be integrated into OpenFOAM. My initial searches have turned up a couple of possibilities but I would like very much to hear from other OpenFOAM users who have successfully implemented one of these packages in their code. Thanks!

April

Hello April
could you please tell me whats the benefit of such a gradient-based optimization algorithm in CFD simulations?
is there any document which help me to find out how it works?

april0100 · December 20, 2012, 13:37

Hello,

Zifei- I'm currently using the DAKOTA Optimization Toolkit. It is available through Sandia Labs (for free) and was relatively easy to interface with OpenFOAM. There is information in the User's Guide (Chapter 18) that describes the steps needed to set up a general script interface. I also suggest downloading the Jaguar GUI and working through the 'generic' script_interfaces tutorial to get a feel for how the communication between DAKOTA and an outside model works. Additionally I found this post to be helpful in detailing the necessary steps for the OpenFOAM interfacing:

http://www.extend-project.de/user-fo...imit=6&start=6

Nima- I'm using the gradient-based optimization in OpenFOAM to perform contaminant source inversion. I'm using gradient-based methods in particular because they are more efficient than non-gradient methods and efficiency is imperative for my problem. Much of the existing literature on optimization in CFD concerns shape optimization, such as the work by Carsten Othmer et al.:

http://citeseerx.ist.psu.edu/viewdoc...0.1.1.123.1479

As for a detailed document explaining how to implement it in a CFD application, you may have to wait until I finish my dissertation

April

yzf1215 · December 20, 2012, 19:16

Thanks, that helps a lot.

stefmascio · February 26, 2013, 09:31

why don't you try IOSO optimization software?
It use surface response methods together with evolutionary models, very performing!

October 5, 2012, 10:43	Gradient-Based Optimization in OpenFOAM	#1
april0100 New Member April Join Date: Jul 2011 Location: Ann Arbor, MI Posts: 7 Rep Power: 14	Dear OpenFOAMers, I'm looking for a gradient-based optimization algorithm that can easily be integrated into OpenFOAM. My initial searches have turned up a couple of possibilities but I would like very much to hear from other OpenFOAM users who have successfully implemented one of these packages in their code. Thanks! April AlphaSheep likes this.

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December 18, 2012, 23:32		#2
yzf1215 Member Zifei Yin Join Date: Sep 2012 Location: Shanghai & Ames Posts: 33 Rep Power: 13	I‘m doing the same work as you might have done. I'm also looking for a gradient-based optimization algorithm that can easily be integrated into OpenFOAM. Would you please give me some help? My email address is yzf1215@gmail.com

December 20, 2012, 13:37		#4
april0100 New Member April Join Date: Jul 2011 Location: Ann Arbor, MI Posts: 7 Rep Power: 14	Hello, Zifei- I'm currently using the DAKOTA Optimization Toolkit. It is available through Sandia Labs (for free) and was relatively easy to interface with OpenFOAM. There is information in the User's Guide (Chapter 18) that describes the steps needed to set up a general script interface. I also suggest downloading the Jaguar GUI and working through the 'generic' script_interfaces tutorial to get a feel for how the communication between DAKOTA and an outside model works. Additionally I found this post to be helpful in detailing the necessary steps for the OpenFOAM interfacing: http://www.extend-project.de/user-fo...imit=6&start=6 Nima- I'm using the gradient-based optimization in OpenFOAM to perform contaminant source inversion. I'm using gradient-based methods in particular because they are more efficient than non-gradient methods and efficiency is imperative for my problem. Much of the existing literature on optimization in CFD concerns shape optimization, such as the work by Carsten Othmer et al.: http://citeseerx.ist.psu.edu/viewdoc...0.1.1.123.1479 As for a detailed document explaining how to implement it in a CFD application, you may have to wait until I finish my dissertation April

December 20, 2012, 19:16		#5
yzf1215 Member Zifei Yin Join Date: Sep 2012 Location: Shanghai & Ames Posts: 33 Rep Power: 13	Thanks, that helps a lot.

February 26, 2013, 09:31		#6
stefmascio Member Stefano Join Date: Mar 2009 Posts: 59 Rep Power: 17	why don't you try IOSO optimization software? It use surface response methods together with evolutionary models, very performing!