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Why is cos(u) giving me a result bigger than 1.

Posted 18.06.2020, 22:03 GMT-4 General, Introduction, Mesh, Results & Visualization, Studies & Solvers Version 5.2a 1 Reply

Fernando J. Pena Cantu
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Hi,

I am doing the contour plot of one of my solutions. There contour plot is cos(u) where u is my soltuion. The problem is that the results of show that cos(u) can be larger than 1 in certian areas. Which is impossible regardless of the value of u. What is going on? I have attached a picture.

My version of comsol is 5.2

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1 Reply Last Post 19.06.2020, 01:23 GMT-4
Gunnar Andersson COMSOL Employee

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Posted: 4 years ago 19.06.2020, 01:23 GMT-4

real(cos(u)) can be larger than 1 if u has a nonzero imaginary part. You can check if this is the case by creating a surface plot of imag(u).

real(cos(u)) can be larger than 1 if u has a nonzero imaginary part. You can check if this is the case by creating a surface plot of imag(u).

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