Message Boards Message Boards

NDSolveValue error: fewer dependent variables

Posted 4 months ago

i need your help plz i have an issue it show me error that you have fewer dependent variable than equation but i have 4 equation and 4 dependent variable sir please check it be the issue

POSTED BY: Abid Hussain
4 Replies

Thank you sir what should i do now

POSTED BY: Abid Hussain

Your equation bcs[Re1, \[Beta], A1, S1, S2][[1, 1]] is a little odd:

u[t, x, 0] == Re1*x + Derivative[0, 0, 1][u][t, x, y] + Derivative[0, 1, 0][v][t, x, y]

The left-hand side has y==0 while the right-hand side has free y. Are you sure of that?

POSTED BY: Gianluca Gorni

Dear Abid Hussain,

If you are asking me, "what should i do now," I would add to Gianluca's comment that you say in the original post (OP) that you have 4 equations in 4 unknowns. The code has 5 equations in 4 unknowns. I'd suggest that the code be changed to the 4 equations in 4 unknowns you refer to in the OP. I don't know what they are, so I cannot offer any further advice.

POSTED BY: Michael Rogers

POSTED BY: Michael Rogers
Reply to this discussion
Community posts can be styled and formatted using the Markdown syntax.
Reply Preview
Attachments
Remove
or Discard

Group Abstract Group Abstract