Solving PDE for F and F' in 2D Space: Relation between Variables x, t and t

  • Context: Graduate 
  • Thread starter Thread starter Arjun S
  • Start date Start date
  • Tags Tags
    Pde
Click For Summary
SUMMARY

The discussion focuses on solving partial differential equations (PDEs) for the functions F(x,t) and F'(x',t') in a two-dimensional space. The relationship is defined by the equations ∂F/∂t − c(∂F/∂x) = ∂F'/∂t' and ∂F'/∂t' − c(∂F'/∂x') = ∂F/∂t. It is established that F'_x' = -F_x, indicating a specific relationship between the derivatives of F and F'. However, participants agree that an additional constraint is necessary to fully determine the relationship between F and F'.

PREREQUISITES
  • Understanding of partial differential equations (PDEs)
  • Familiarity with coordinate transformations in two-dimensional space
  • Knowledge of derivative notation and operations
  • Basic concepts of wave propagation and characteristics
NEXT STEPS
  • Research methods for applying boundary conditions to PDEs
  • Explore coordinate transformation techniques in PDE analysis
  • Study the characteristics method for solving hyperbolic PDEs
  • Learn about additional constraints in PDE systems for unique solutions
USEFUL FOR

Mathematicians, physicists, and engineers working with partial differential equations, particularly those involved in wave mechanics and coordinate transformations.

Arjun S
Messages
1
Reaction score
0
If I have a function "F" in a two-dimensional space F(x,t) and its analog F' in another co-ordinate system F'(x',t') and the relation between the two is given by :

∂F/∂t −c(∂F/∂x) =∂F ′/ ∂t ′

How do I find a relation between F and F ′ and between the variables x,t and t ′ ?
 
Physics news on Phys.org
If you also had:

∂F'/∂t' −c(∂F'/∂x') =∂F / ∂t

Then you'll get: F'_x' = -F_x.
But you still need another constraint to find a relation between F and F'.

The problem as it is stated doesn't seem to me solvable, perhaps someone else knows better than me.
 

Similar threads

  • · Replies 3 ·
Replies
3
Views
3K
  • · Replies 0 ·
Replies
0
Views
4K
  • · Replies 4 ·
Replies
4
Views
4K
  • · Replies 5 ·
Replies
5
Views
3K
  • · Replies 4 ·
Replies
4
Views
3K
  • · Replies 2 ·
Replies
2
Views
4K
  • · Replies 6 ·
Replies
6
Views
3K
  • · Replies 2 ·
Replies
2
Views
3K
  • · Replies 12 ·
Replies
12
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K