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zhk
zhk
6:53 AM
@xzczd hello there
 
xzczd
xzczd
7:14 AM
@zhk Hello
 
zhk
zhk
7:36 AM
@xzczd I am getting empty plot

https://www.dropbox.com/s/4l24gltlyfbqhyk/v%20sheet%201.nb?dl=0

can u please check?
 
xzczd
xzczd
@zhk I'm still in v9 so can't run the code, but I think it's because, it should be ParametricNDSolveValue rather than ParametricNDSolve
Also, sol[#][1, zeta] &@{0, 0.5, 1} should be sol[#][1, zeta] &/@{0, 0.5, 1}//Evaluate
 
zhk
zhk
@xzczd thx it worked just fine.
 
xzczd
xzczd
And, the interpretation for the robin boundary condition is wrong, I think
 
zhk
zhk
@xzczd I was suppose to ask this but you already said it
so where i went wrong?
 
xzczd
xzczd
7:55 AM
@zhk After checking the document carefully, I think it's correct 囧
 
zhk
zhk
@xzczd I followed C.E. suggestion to input these conditions
@zhk First, do you have any reason to believe that your answer is wrong. If so, why? Second, you have the boundary condition du/dx = -u[x], why would you not have du/dx = NeumannValue[-u[x, y], x==1] instead of NeumannValue[u[x, y], x==1] ?
 
xzczd
xzczd
@zhk This depends on the direction of outer normal vector
 
zhk
zhk
@xzczd Thx for your feed back.
 
xzczd
xzczd
See the Detail of Neumann condition
 
zhk
zhk
@xzczd OK i will thx
 
xzczd
xzczd
8:03 AM
You're welcome
 
zhk
zhk
@xzczd this the actual condition
 
xzczd
xzczd
8:33 AM
@zhk Wait, there exists something troublesome.
Now I should say I'm not sure what's the correct interpretation of the robin condition when "FiniteElement" method is used for the equation.
It's not clear to me how epsilon is handled inside NDSolve when "FiniteElement" is used.
I think it's better to ask this in the main site.
 
zhk
zhk
9:01 AM
@xzczd ok
 
 
12 hours later…
VividD
VividD
8:59 PM
hi folks
there is a huge bounty question on interesting topic
check it out
 

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