Hello! I am new to COMSOL and would love to hear more about these options in COMSOL. So under the pointwise constraint, there are constraint expression and constraint force expression. Mind to explain the differences in the input?
I know constraint force expression has to be expressed using test() or var() operation, but what is the differences between using this or not? and can I use constant value while writing in the constraint force expression ?
for example:
in constraint expression:
c2-K*c1
in constraint force expression:
test(c2)-test(c1)*K or test(c2)-test(c1)?