FLUENT - Forced Convection - Problem Specification

Problem Specification

This tutorial will shows you how to model a forced convection in a pipe. The diagram shows a pipe where in the middle, there is a heated section. The ambient air is flowing into the pipe from the left with a uniform velocity. What will be the steady state temperature at the outlet of the pipe? How will the temperature change along the pipe? We will tackle all these questions in our simulation.

Available Information

Pipe Geometry:
Pipe radius = 2.94e-2 m
Pipe length = 6.096 m

Air Properties:
Ambient pressure = 98338.2 Pa (Use as reference pressure)
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)

[*Go to Step 1: Pre-Analysis & Start-Up*]

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