 |
where 
is the height of a film at position 
and time 
and 
is a parameter characteristic of the surface forces.
Lubrication Equation
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References
Cipra, B. "Waterworld." What's Happening the Mathematical Sciences 3, 67-69, 1995.Referenced on Wolfram|Alpha
Lubrication EquationCite this as:
Weisstein, Eric W. "Lubrication Equation." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/LubricationEquation.html