Hi, I worked on coupling Nektar++ and OpenFOAM a while back. To obtain lamb vector as a sound source, I first had a time averaged flow and then calculated the fluctuating lamb vector by subtracting the instantaneous lamb vector from the mean value. This value was then transferred to Nektar++ using CWIPI coupling. The process should be fairly similar if you are going for a file based coupling. You can refer to the following article for more information Arya, Nitish, and Ashoke De. "Effect of vortex and entropy sources in sound generation for compressible cavity flow." *Physics of Fluids* 33.4 (2021). cheers, Nitish On Tue, Nov 5, 2024 at 3:13 PM feigao2024 <feigao2024@126.com> wrote:
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Hello, everyone I saw some posts regarding the CAA in Nektar, I have some questions. Also, I want to couple the Compressible solver and Acoustic solver. First, how can I get the Lamb vector in Compressible solver? Second, if I export the result average file from the thirdparty CFD solver, then how can I transform the result file to .fld or .pts?
Is there anything else I should be aware of about CAA in Nektar?
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