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How to assign a unit to a variable?
Posted Apr 15, 2011, 10:35 a.m. EDT Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.2a 2 Replies
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Hey people
I am using 4.0, and I define a long list of variables, so I gave a name, an expression and a description for each of them, but I couldnt assign any unit (the 'unit' column is greyed out), consequently, I noticed 'unexpected unit of input' warning messages under physics I have added so far. Any ideas that I can, somehow, give unit to each variable?
Appreciate much for your help!!
regards
I am using 4.0, and I define a long list of variables, so I gave a name, an expression and a description for each of them, but I couldnt assign any unit (the 'unit' column is greyed out), consequently, I noticed 'unexpected unit of input' warning messages under physics I have added so far. Any ideas that I can, somehow, give unit to each variable?
Appreciate much for your help!!
regards
2 Replies Last Post Sep 18, 2016, 5:58 a.m. EDT
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Posted:
1 decade ago
Hi
v4.0 was the first version after the (r)evolution of COMSOL to its new screen and physics approach. Everything was not implemented, I strongly advise you to upgrade to latest version, it contains many enhancements
second a variable normally inherits it's units from the equation you use so if you write v = 4[m]/(2[s]) you should get v=2 and units [m/s] just as for "parameters" apart that normally there is few constant and many other variable names in COMSOL's variales so it does not show th result, as this might be a field, or many values, but then the units do sho up
--
Good luck
Ivar
v4.0 was the first version after the (r)evolution of COMSOL to its new screen and physics approach. Everything was not implemented, I strongly advise you to upgrade to latest version, it contains many enhancements
second a variable normally inherits it's units from the equation you use so if you write v = 4[m]/(2[s]) you should get v=2 and units [m/s] just as for "parameters" apart that normally there is few constant and many other variable names in COMSOL's variales so it does not show th result, as this might be a field, or many values, but then the units do sho up
--
Good luck
Ivar
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Posted:
8 years ago
Hi
using the version 5.2, in the variable expression i try to use sinh(phi) or cosh(phi) and give them a name , the unit of (phi) is the volt wich is the variable of electrostatic module, but the color is orange and show ''unexpected unit of input'' so i can't used it in boundary condition ad i can't solve my problem
Appreciate much for your help!!
using the version 5.2, in the variable expression i try to use sinh(phi) or cosh(phi) and give them a name , the unit of (phi) is the volt wich is the variable of electrostatic module, but the color is orange and show ''unexpected unit of input'' so i can't used it in boundary condition ad i can't solve my problem
Appreciate much for your help!!