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{alias:forced convection}
{include: FLUENT - Forced Convection - Panel}

h2. Problem Specification

!Forced Convection Problem Specification.png!

This tutorial shows you how to simulate forced convection in a pipe using ANSYS FLUENT 12. The simulation corresponds to the forced convection experiment in MAE 4272 at Cornell University. The diagram shows a pipe with a heated section in the middle where constant heat flux is added at the wall. The ambient air is flowing into the pipe from the left with a uniform velocity. We'll use FLUENT to solve the relevant boundary-value problem and obtain the velocity, temperature, pressure and density distribution in the pipe. Inputs necessary for the simulation, such as the velocity at the pipe inlet and heat flux added at the wall, are obtained from one particular experimental run. Results from the simulation will be compared with corresponding experimental values.

h4. Simulation Inputs Obtained from Experiment

*Pipe Geometry:*
Circular cross-section
Pipe radius = 2.94e-2 m
Pipe length = 6.096 m

*Material Properties:*
Coeff. of viscosity = 1.787e-5 kg/(m s)
Cp = 1005 J/(kg K)
Thermal conductivity = 0.0266 W/(m K)
Molecular weight = 28.97 g/mole

*Inlet:*
• u = 25.05 m/s
• v = 0 m/s
• T = 298.15 K
• k = 0.09 m2/s2; epsilon = 16 m2/s3 (These are not measured and are rough guess values)

*Outlet:*
• Pressure = 97225.9 Pa

*Wall:*
• Heating between x = 1.83 m and x = 4.27 m
• Wall heat flux = 3473.9 W/m2
• Wall roughness: 0 (assume smooth)
• Wall thickness: 0 (assume negligible)

*Ambient conditions:*
• Ambient pressure = 98338.2 Pa

h4. Experimental Data for Comparison with Simulation Results

!expt_data1.png!\\  !expt_data2.png!
 
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