Evolution of maximum of first order PDE

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This is my first question, I hope it's not a duplicate or too easy:

I have a first order PDE for a function $\omega(x,t)$ of position $x \in \mathbb{R}$ and time $t \in [0,\infty]$: $$ \partial_t \omega = -\ln(1+e^{x}) - v \partial_x \omega + \frac{D}{2} (\partial_x \omega)^2 $$ Where $v,D>0$ are real positive constants. The initial condition are: $$ \omega(x,t=0) = -(x - \mu)^2 $$ With again $\mu>0$ real positive constant. I am interested in studying the evolution of the maximum of $\omega(x,t)$ over time. At initial time $\omega(x,t=0)$ has maximum at $x=\mu$. As time goes on how does the maximum evolve? Can I write a differential equation for its evolution? I believe that this maximum will converge to a fixed value at infinite time.

Thanks to you in advance!

Ps: ultimately my aim is finding the convergence value of the maximum at infinite time (hoping there is one). Any technique which allows to find this would do the job!

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You can solve the auxiliary problem without the $-\ln(1+e^x)$ source term using separation of variables and the use Green's Functions to include the source term.

References:

M. N. Ozisik, Heat Conduction, 2nd Edition, J.Wiley & Sons, 1993. (See Chapter 6)

H.S. Carslaw & Jaeger, Conduction of Heat in Solids, Oxford Clarendon Press, 1959.