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Dealing with nonlinear ODE with contraint equations |
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August 24, 2010, 15:52 |
Dealing with nonlinear ODE with contraint equations
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#1 |
Member
Jeong Kim
Join Date: Feb 2010
Posts: 42
Rep Power: 16 |
I'd like to solve the below highly nonlinear ODEs with constraint equations. Eq 1 is a 2nd order ODE, so I need two BCs where only one BC is specified and the other should be determined by Eq2. I have no clue on how to approach this kind of problem and don't know how to use Eq 2. I really appreciate that if you could give me some helps to resolve those constraints in terms of numerics. Thanks.
Governing Equations -------------------- nu: 2*(1+nu+nu^2)*nu'*nu'' + (2*nu+1)*(nu')^3 = 0, (Eq 1) Boundary Conditions ------------------- nu(-1) = 0.2, nu(1) = alpha (determined by Eq2) Constraints ------------- N=integral( nu*dY ) dY from Y=-1 to Y=1, (Eq 2) Eq 4 should be used to determine alpha Last edited by enoch; August 25, 2010 at 10:51. |
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August 25, 2010, 10:25 |
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#2 |
Member
private
Join Date: Mar 2009
Posts: 74
Rep Power: 17 |
N and U appear in the equations but are not mentioned in your description. U' also appears. Something must be missing.
You might try again to specify your problem. |
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