The Blausius equation related to boundary layer theory is

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The Blausius equation related to boundary layer theory is a

1. third-order linear partial differential equation
2. third-order nonlinear partial differential equation
3. second-order nonlinear ordinary differential equation
4. third-order nonlinear ordinary differential equation

Correct Option: D

Blausius equation:

2d³f	+	fd²f	= 0
dη³		dη²

This order non-linear D.E.