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Author: Rajesh Bhaskaran, Cornell University

{color:#ff0000}{*}Problem Specification{*}{color}
[1. Pre-Analysis & Start-up|FLUENT - Laminar Pipe Flow Step 1]
[2. Geometry|FLUENT - Laminar Pipe Flow Step 2]
[3. Mesh|FLUENT - Laminar Pipe Flow Step 3]
[4. Setup (Physics)|FLUENT - Laminar Pipe Flow Step 4 *New]
[5. Solution|FLUENT - Laminar Pipe Flow Step 5 *New]
[6. Results|FLUENT - Laminar Pipe Flow Step 6 *New]
[7. Verification & Validation|FLUENT - Laminar Pipe Flow Step 7]
[Problem 1|FLUENT - Laminar Pipe Flow Problem 1]
[Problem 2|FLUENT - Laminar Pipe Flow Problem 2]
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h2. Problem Specification

!Fluent_pipeflow.jpg!

Consider fluid flowing through a circular pipe of constant cross-section. The pipe diameter _D_ = 0.2 m and length _L_ = 8 m. The inlet velocity _Ū{_}{_}{~}z{~}_ = 1 m/s. Consider the velocity to be constant over the inlet cross-section. The fluid exhausts into the ambient atmosphere which is at a pressure of 1 atm. Take density _ρ = 1 kg/ m{_}{_}{^}3{^}_ and coefficient         of viscosity _µ = 2 x 10{_}{_}^\-3{^}_ _kg/(ms)._ The Reynolds number _Re_ based on the pipe diameter is
{latex}
\large
$$
{Re} = {\rho {\bar{U}}_zD \over \mu} = 100
$$
{latex}
where _Ū{_}{_}{~}z{~}_ is the average velocity at the inlet, which is 1 m/s in this case.

Solve this problem using FLUENT. Plot the centerline velocity, wall         skin-friction coefficient, and velocity profile at the outlet. Validate         your results.

Note: The values used for the inlet velocity and flow properties are         chosen for convenience rather than to reflect reality. The key parameter         value to focus on is the Reynolds no.
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