System of 1st Order PDEs - Method of Lines

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SUMMARY

The discussion focuses on solving a system of six first-order nonlinear partial differential equations (PDEs) using the Method of Lines. This approach involves discretizing the spatial variables while keeping the time variable continuous, transforming the PDEs into a larger system of ordinary differential equations (ODEs). The ODEs are then solved using the Matlab solver ode15s. A challenge arises when two equations lack time-dependent derivatives, prompting a request for guidance on how to address this issue.

PREREQUISITES
  • Understanding of first-order nonlinear partial differential equations (PDEs)
  • Familiarity with the Method of Lines for numerical solutions
  • Proficiency in using Matlab, specifically the ode15s solver
  • Knowledge of ordinary differential equations (ODEs) and their properties
NEXT STEPS
  • Research the Method of Lines for solving PDEs in detail
  • Explore techniques for handling equations without time-dependent derivatives
  • Learn advanced features of Matlab's ode15s solver for improved performance
  • Study the implications of discretization in numerical methods for PDEs
USEFUL FOR

Mathematics students, researchers in applied mathematics, and engineers working with numerical methods for solving partial differential equations.

chole88
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Homework Statement



6 1st order, nonlinear PDEs in one space and one time variable.
6 variables are function of space and time: a, b, c, d, e f

2. The attempt at a solution
Method of lines - Discretize in space. Turns system of PDEs into a much larger system of ODEs. The time term remains untouched (not discretized). Solve the ODEs using Matlab solver, ode15s.

3. Roadblock
Two of the equations do not have time-dependent derivatives in them. How do I enforce this?
 
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chole88 said:

Homework Statement





3. Roadblock
Two of the equations do not have time-dependent derivatives in them. How do I enforce this?

You didn't give us these two differential equations, or, in fact any of the other equations, that makes it a bit hard to offer help.
 

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