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Unsteady-State Flow in a Tube by Orthogonal Collocation Method


	In transport phenomena it is very common to encounter unsteady-state problems. This Demonstration describes the solution of a partial differential equation that describes unsteady-state flow in a tube, using an orthogonal collocation method.


	Contributed by: Jorge Gamaliel Frade Chávez

Unsteady flow in a tube is described by the following dimensionless partial differential equation:

with these boundary conditions:

and the initial condition:

In the partial differential equation

is nondimensional velocity,

is nondimensional time, and

is nondimensional position.

References: J. V. Villadsen and W. E. Stewart, "Solution of Boundary-Value Problems by Orthogonal Collocation," Chemical Enginering Science, 22, 1967 pp. 3981–3996.

R. B. Bird, W. E. Stewart, and E. N. Lightfoot, Transport Phenomena, 2nd ed., New York: John Wiley and Sons.

"Unsteady-State Flow in a Tube by Orthogonal Collocation Method" from The Wolfram Demonstrations Project
http://demonstrations.wolfram.com/UnsteadyStateFlowInATubeByOrthogonalCollocationMethod/

Contributed by: Jorge Gamaliel Frade Chávez

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