Solving Equation with ndsolve: dp/dt, a,b,c,theta

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SUMMARY

The discussion centers on solving the partial differential equation (PDE) represented by dp/dt = a * d²p/dx² * cos²(theta) + b * d²p/dt² + c * d²p/d(theta)², where a, b, and c are constants. It is established that the NDSolve function cannot be utilized for this PDE due to its complexity. Participants suggest that solving PDEs requires more advanced techniques than those available in NDSolve, indicating a need for alternative methods to tackle such equations.

PREREQUISITES
  • Understanding of partial differential equations (PDEs)
  • Familiarity with the NDSolve function in Mathematica
  • Knowledge of second derivatives and their notation
  • Basic concepts of trigonometric functions, specifically cosine
NEXT STEPS
  • Research alternative methods for solving partial differential equations, such as the finite difference method
  • Explore the use of Mathematica's PDEModeling package for advanced PDE solutions
  • Learn about separation of variables as a technique for solving PDEs
  • Investigate numerical methods for PDEs, including the method of characteristics
USEFUL FOR

Mathematicians, physicists, and engineers dealing with complex systems modeled by partial differential equations, as well as students seeking to deepen their understanding of PDEs and numerical methods for their solutions.

zahra
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Hi.
How can i solve below equation with ndsolver ?
dp/dt = a * d^2p/dx^2 * cos^2 (theta) + b d^2p/dt^2 + c d^2p /d(theta)^2
where a , b, c are constant. d^2p/dx^2 is second derivative with respect to x. theta is angle.
 
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Hi zahra, welcome to PF!

p is a function of x, theta, and t, so this is not an ordinary differential equation, but a partial differential equation. NDsove can't be used. Solving PDEs is not trivial.
 
Hi DrClaude .thanks!
Really ? but my master told me that use NDS ! Do we have other way to solve this proplem?
 

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