[hitzhwan]

when I use the expression in the fluent, it gives the following errors, what is the reason?

velocity magnitude=0.073963122*(1+0.5*sin(2*PI*22*t))

Cannot plot expression: Traceback (most recent call last):
File "<string>", line 1, in <module>
RuntimeError: sin: The argument should be either dimensionless or have units of Angle but it has units of [s]

[FMDenaro]

Originally Posted by hitzhwan

when I use the expression in the fluent, it gives the following errors, what is the reason?

velocity magnitude=0.073963122*(1+0.5*sin(2*PI*22*t))

Cannot plot expression: Traceback (most recent call last):
File "<string>", line 1, in <module>
RuntimeError: sin: The argument should be either dimensionless or have units of Angle but it has units of [s]

The reason is that the argument in the sin function is dimensional. You need to define something like t/T.