OSI in COMSOL

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Hello,

I am simulating intracranial artery. I need help to calculate OSI in COMSOL. I calculated WSS with tis expression: WSS = sqrt(spf.K_stressx^2 + spf.K_stressy^2 + spf.K_stressz^2). It worked for me. Is it right?

For OSI I tried this: OSI = 0.5 * (1 - abs(timeint(0, T, WSS)) / timeint(0, T, abs(WSS))), it is not working, unless I am doing it wrong. Can someone help me to calculate OSI step by step? I would be very thankful.


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