How Can I Solve Second Order Inhomogeneous PDEs with a Forcing Term?

  • Thread starter Onias
  • Start date
  • Tags
    Pdes
In summary, homogeneous PDEs have a zero constant term, while inhomogeneous PDEs have a nonzero constant term. To determine the general solution to an inhomogeneous PDE, you first need to solve the associated homogeneous PDE. Some common techniques for solving inhomogeneous PDEs include the method of separation of variables, the method of characteristics, and the method of Green's functions. Inhomogeneous PDEs can also be solved numerically using techniques such as finite difference methods, finite element methods, and spectral methods. These numerical methods involve discretizing the PDE and solving the resulting system of equations using a computer. In real-world applications, inhomogeneous PDEs are used to model complex systems and make
  • #1
Onias
24
0

Homework Statement


Hello, I'm having a problem solving second order inhomogeneous PDEs, for example the standard heat equation with a forcing term Sin(x)Sin(t) added onto it on the right hand side.


Homework Equations



ut = uxx + Sin(ax)Sin(bt)

The Attempt at a Solution


I can solve it for the homogeneous case using separation of variables, but where do I go from there? Thanks in advance.
 
Physics news on Phys.org
  • #2
Greens function?
 

FAQ: How Can I Solve Second Order Inhomogeneous PDEs with a Forcing Term?

What is the difference between homogeneous and inhomogeneous PDEs?

Homogeneous PDEs have a zero constant term, while inhomogeneous PDEs have a nonzero constant term. This means that the solution to a homogeneous PDE will be equal to zero at the boundaries, while the solution to an inhomogeneous PDE will have non-zero values at the boundaries.

How do you determine the general solution to an inhomogeneous PDE?

To determine the general solution to an inhomogeneous PDE, you first need to solve the associated homogeneous PDE. Then, you can use the method of variation of parameters or the method of undetermined coefficients to find a particular solution to the inhomogeneous PDE. The general solution will be the sum of the homogeneous solution and the particular solution.

What are some common techniques for solving inhomogeneous PDEs?

Some common techniques for solving inhomogeneous PDEs include the method of separation of variables, the method of characteristics, and the method of Green's functions. These methods can be used to solve different types of inhomogeneous PDEs, depending on the boundary conditions and the form of the PDE.

Can inhomogeneous PDEs be solved numerically?

Yes, inhomogeneous PDEs can be solved numerically using techniques such as finite difference methods, finite element methods, and spectral methods. These numerical methods involve discretizing the PDE and solving the resulting system of equations using a computer.

How are inhomogeneous PDEs used in real-world applications?

Inhomogeneous PDEs are used in a wide range of real-world applications, such as modeling heat transfer, fluid dynamics, and electromagnetism. They are also used in finance, biology, and other fields to model complex systems and make predictions. Solving inhomogeneous PDEs allows scientists to better understand and analyze these systems, leading to advancements in technology and other areas.

Back
Top