Hi Armin, how are you? I have a question about impedance. I was reading this article titled "Static flow resistivity measurements based on the ISO 10534.2 standard impedance tube" and I would like to calculate the resistivity to the flow using the impedance formulas that the author brings to the text, in COMSOL. I believe that one of them you already presented in the video, but the others I am not able to do. Could you help me , please? Can you use the same geometry as in your video.
@@caewitharminhashemi Hi Armin. Thanks for answering. I would like you to help me put in COMSOL (in the variables part) the impedance that appears in the article I mentioned. I didn't want to bother you, you taught me a lot but I have doubts about how to put this variable that appears in the article in COMSOL.
R is reflection coefficient. Pressure reflected to pressure incident. Here I used power, not pressure (p). Therefore alpha =1-R. Power is proportional to p^2.
Well noted. Thanks. I have one more question. If we calculate the reflection coefficient (R) from surface impedance (Zs), is it possible to realize it in Comsol?
Hi Armin, how are you? I have a question about impedance. I was reading this article titled "Static flow resistivity measurements based on the ISO 10534.2
standard impedance tube" and I would like to calculate the resistivity to the flow using the impedance formulas that the author brings to the text, in COMSOL. I believe that one of them you already presented in the video, but the others I am not able to do. Could you help me , please? Can you use the same geometry as in your video.
Hello. how can i help you
@@caewitharminhashemi Hi Armin. Thanks for answering. I would like you to help me put in COMSOL (in the variables part) the impedance that appears in the article I mentioned. I didn't want to bother you, you taught me a lot but I have doubts about how to put this variable that appears in the article in COMSOL.
@@gabrielhernandezrozo848 please email me article.
@@caewitharminhashemi I sent you the article by email.
alpha = 1-R, or alpha = 1-R^2..? which one is correct?
R is reflection coefficient. Pressure reflected to pressure incident. Here I used power, not pressure (p). Therefore alpha =1-R. Power is proportional to p^2.
Well noted. Thanks. I have one more question. If we calculate the reflection coefficient (R) from surface impedance (Zs), is it possible to realize it in Comsol?
@@BondanDwisetyo yes. There are several examples in Comsol library