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Hi~ I have a question about "Linearization point" in Acoustics module
Posted Jan 20, 2016, 9:10 p.m. EST Acoustics & Vibrations Version 5.0 0 Replies
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1. I don't know the meaning of "Values of Linearization point" and "Value of eigenvalue linearization point"
2. How to solve the "nonlinear eigenvalue problem?"
I am studying the "Combustion Instability" using COMSOL.
I am using "Pressure Acoustic in frequency domain"
In my case, a pressure gradient is in a monopole sourceterm.
Therefore, the governing equation turns into the below form.
------> (A + wB + w^2)p = Cp
*A,B,C: Constant, w: angular frequency, p: pressure
It is a nonlinear eigenvalue problem, so to solve this equation, there are well-known algorithms. (Arnoldi method, Krylov-Schur method)
In order to solve the above equation, how to handle the options in COMSOL?
In the present, I select the "Initial expression" and "Zero" in "Values of linearization" menu.
And, I enable the "Transform point" option and write the value which came from the calculation.
I repeat again and again until the "value of tramsform point" is same with the "value of solution from COMSOL calculation" (Converging process)
Am I RIGHT doing like this? -------------Question2
Also, could anyone let me know the meaning of "Values of Linearization point" and "Value of eigenvalue linearization point"? -------------Question1
Hello Seungtaek Oh
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