Solve the Riemann Problem

Consider the Riemann Problem (RP) for the traffic flow model

$u_t + (u − u^2)_x = 0$
$U_L = 5/6$ and $U_R = 1/2$

i) Solve the RP. It will have a rarefaction wave.

ii) In the model,

$(u − u^2)/u = 1 − u$

(flux divided by density) is the scaled average speed of an individual car. Find the formula for the position $x(t)$ of a car that starts at $x(0) = −1$ in the traffic described by the RP above. Hint: it will be a three part solution, with two easy parts.

Partial Differential Equations Ordinary Differential Equations Differential Equations
Chdogordon Chdogordon
153
Report

Answer

Answers can only be viewed under the following conditions:
  1. The questioner was satisfied with and accepted the answer, or
  2. The answer was evaluated as being 100% correct by the judge.
View the answer

1 Attachment

Martin Martin
1.7K
The answer is accepted.
Join Matchmaticians Affiliate Marketing Program to earn up to a 50% commission on every question that your affiliated users ask or answer.