Fujita–Storm equation explained

In applied mathematics, Fujita–Storm equation is a nonlinear partial differential equation. It occurs frequently in problems of nonlinear heat and mass transfer, combustion theory and theory of flows in porous media^[1]

$$u\_=a\; (u^\; u\_x)\_x$$

References

1. Andrei D. Polyanin, Valentin F. Zaitsev, Handbook of Nonlinear Partial Differential Equations, equation # 5.1.10.3. second edition p. 212 CRC PRESS