Discussion Closed This discussion was created more than 6 months ago and has been closed. To start a new discussion with a link back to this one, click here.
Unexpected unit of input. :Function- exp
Posted 19 feb 2019, 08:52 GMT-5 General, Heat Transfer, Parameters, Variables, & Functions Version 5.4 2 Replies
Please login with a confirmed email address before reporting spam
I am trying to add an equatiom ii definition node under variable section. It turns yellow showing error message as: **Unexpected unit of input - Function: exp***
Why it is so? What is the mistake in input, can anyone tell? Screenshot attached for reference. Please help.
Attachments:
Please login with a confirmed email address before reporting spam
Hi,
The exponential function exp expects a dimensionless input. I'm not sure what T is, but it might be a temperature, which makes the input to the function dimensionally inconsistent. If the numerator is a temperature, enter it as 9459[K], or else you can "dedimensionalize" the denominator as, for example, T[1/K].
Best regards, Magnus Ringh, COMSOL
Please login with a confirmed email address before reporting spam
Yes, T is temperature. Thanks this worked. This equation is antonie equation. Is there any unit for these constant a, b in antonie eqn to make this equation dimensionally consisitent? as these equation solves for pressure.