First Order Nonlinear Partial Differential Equation

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SUMMARY

The discussion focuses on solving the first order nonlinear partial differential equation (PDE) represented by the equation dv/dt + A*(v^2)*dv/dx = 0, with initial and boundary conditions v(t = 0) = C and v(x = 0) = 0. The method of characteristics is suggested as a potential approach for solving this PDE. A participant outlines a method to derive a solution by expressing the relationship between the derivatives and integrating to find the general solution, ultimately leading to the equation x = Av^2t + K. This approach is confirmed to be valid for the given conditions.

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I have derived a first order nonlinear PDE with its corresponding initial and boundary conditions given by:

dv/dt + A*(v^2)*dv/dx = 0 (where A is a constant)

v(t = 0) = C (constant value)
v(x = 0) = 0

I'm not quite sure how to solve this. I was thinking about using the method of characteristics, but since I haven't had too much experience with it, I'm not sure if it would be applicable here. If anyone has any hint on how to get started, I would really appreciate it. Thanks in advance.
 
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I have no experience either but to get started what I would do is write that

\frac{∂v}{∂t}/\frac{∂v}{∂x} = -Av^2

Then at constant v

( \frac{dx}{dy})_v = Av^2

x = Av^2t + K at constant v.

Fitting that to your initial conditions generates your surface I think. :rolleyes: Something like that.
 
Solved! Thanks!
 
They don't count that as non-linear AFAIK though.
 

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