What are Initial Conditions and How Do You Write Them for the 2D Wave Equation?

Click For Summary
Initial conditions are essential starting values for mathematical models, particularly in the context of the 2D wave equation. To write these conditions, it's crucial to identify the relevant variables and parameters that will influence the system's behavior. After identifying these elements, specific values must be assigned to each variable and parameter. If there are changes over time, a range of values may be necessary for accurate representation. Properly defining initial conditions is vital for accurately modeling the dynamics of the system.
RealKiller69
Messages
11
Reaction score
1
Homework Statement
The statement of the problem is as follows: A square drum with side L=1 is at rest until two drops falls over it . The wave propagation veclocity is c=1m/s.The drops injects E=0.01J into the system at t_0=0 s. The boundry conditions are Neuman's.

The problem im having is with the initial form of the drums membrane. How should i write the initial conditions( visually the grid points where the drops impacts should elevate a little bit ( it can be thought of dirac delta ) and then the wave will propagate from both ends ) knowing the integral form of the energy???+
The problem asks for the form of the membrane after 2 seconds, this should be quite easy if I can write the initial conditions.
Relevant Equations
Wave equation
I am having problems writing the initials conditions.
IMG_20210508_190005.jpg
 
Physics news on Phys.org
Initial conditions are the starting values of a system or process at a given time. They are typically used in mathematical models and equations to describe the behavior of a system or process over time. In order to write the initial conditions for a given system or process, you must first identify the relevant variables and parameters that need to be specified. Once these are identified, you can then assign specific values to each of them. If the variables and parameters change over time, you may need to specify a range of values for each variable or parameter.
 
I want to find the solution to the integral ##\theta = \int_0^{\theta}\frac{du}{\sqrt{(c-u^2 +2u^3)}}## I can see that ##\frac{d^2u}{d\theta^2} = A +Bu+Cu^2## is a Weierstrass elliptic function, which can be generated from ##\Large(\normalsize\frac{du}{d\theta}\Large)\normalsize^2 = c-u^2 +2u^3## (A = 0, B=-1, C=3) So does this make my integral an elliptic integral? I haven't been able to find a table of integrals anywhere which contains an integral of this form so I'm a bit stuck. TerryW

Similar threads

Replies
4
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 20 ·
Replies
20
Views
3K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K
Replies
2
Views
2K
Replies
5
Views
2K
  • · Replies 10 ·
Replies
10
Views
2K
Replies
1
Views
1K
  • · Replies 4 ·
Replies
4
Views
2K