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Transport Phenomena, Unsteady state & non-Newtonian fluids

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Mohamed Ismail

on 17 April 2015

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Transcript of Transport Phenomena, Unsteady state & non-Newtonian fluids

Useful only for semi-infinite regions, such that the initial condition and the boundary condition at infinity may be combined into a single new boundary condition.
Flow of non-Newtonian fluids
Unsteady state- Separation of variables (Product method)
Velocity depends on both position and time
Transport Phenomena
Momentum Transfer

Today's Topics
Unsteady state flow of Newtonian fluids
Non-Newtonian fluids don't obey Newton's law of viscosity. Their viscosity depends on the shear rate
Unsteady state-
Combination of variables
Flow of non-Newtonian fluids
Unsteady state flow
Combination of variables
Separation of variables
To solve PDE
assume v=f(t)*g(y)
Combine t and y into 1 new variable
Note: The solution is usually made easier by assuming the following form (V=Vss+Vt)
We will deal mainly with 2 types of non-Newtonian fluids
Power law fluids
Bingham fluids
Full transcript