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Sorry, I forgot to clarify. I'm using Z as my independent variable instead of T.

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Responded 2 years ago

If you're referring to my original set of equations that I was trying to solve via the DDE solvers, everything I tried didn't wo...

I've actually already tried that, but if you look closely, Ve is coupled with Y4 through Ur. Letting dt approach zero would tran...

Sure. This is a 4 equation system given by the following (note, I will denote terms that depend on the previous time step with a...

The ODEs are a function of the mass balance (what comes in = what goes out), so a knowledge of the variables at the previous ste...

I just realized that I could effectively divide set deltat = t/K where K is some arbitrarily large factor (so that it would ensu...

I know that you can use 'ddesd' and 'dde23' by some arbitrary time constant or as a function of the variables, but is there any ...

Posted 2 years ago

After looking through many lines of code, I realize that the reason MATLAB is accepting an implicit equation without complaint i...

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Answered 2 years ago

If I have two sets of highly coupled ODEs such as: dy/dt = A*dx/dt + B*y + C*x dx/dt = D*dy/dt + E*y + F*x or if I have...

1 Answers

Asked 2 years ago

I was reading this post online where the person mentioned that using "if statements" and "abs()" functions can have negative rep...

I just realized I have a small typo in there. tspan is supposed to be tspan = [T0 TF]. And just to clarify, I'm not referring to...

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If I have a problem that has very small time increments from T0 to TF, are the ODE solvers able to handle such a problem or will...

Is there a way to use 'ddesd' or 'dde23' to evaluate y at the previous time step (by time step, I mean a full time step t+dt)? I...

0 Answers

I have a set of highly non-linear, implicit ODEs and I need to use an implicit solver such as ode15i to integrate the equations....