Fin Pipe Radiator, Heat Transfer CFD Simulation, ANSYS Fluent Training

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In this project, steady cooling process of hot water flow in a fin pipe radiator is investigated.

This product includes Mesh file and a Training Movie.

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Problem description

In this project, steady cooling process of hot water flow in a fin pipe radiator is investigated. Due to high computational cost, only one fin pipe of radiator is simulated. Water flows in the pipe between concentric fins while free convection boundary condition is imposed at fin surface. Water enters and exits the domain with temperature equal to 327K and 326.6214K respectively.

Fin Pipe Radiator Geometry and mesh

Geometry of fluid domain is designed in Design Modeler and computational grid is generated using ANSYS Meshing. Mesh type is unstructured and element number is 624000.

fin pipefin pipe

Solver Configuration for Fin Pipe Radiator CFD Simulation

Critical assumptions:

  • Solver type is assumed Pressure Based.
  • Time formulation is assumed Steady.
  • Gravity effects is neglected.

The following table a summary of the defining steps of the problem and its solution.

Energy On  
Viscous K-epsilon model Standard
Near wall treatment Enhanced wall treatment
Thermal effects on
Fluid Definition method Fluent Database
Material name Water
Solid Definition method Fluent Database
Material name Aluminum
Boundary conditions
Inlet Type Velocity inlet
Mass flow rate 1 m/s
Temperature 327 K
Fin wall Convection h = 100 w/m.k
  Temperature = 300 k
Solver configurations
Pressure-velocity coupling Scheme SIMPLE
Spatial discretization Gradient Least square cell-based
Pressure Standard
Momentum Second order Upwind
Energy Second order Upwind
K First order Upwind
Epsilon First order Upwind


Water mass flow rate at inlet is 0.0783 kg/s. Water temperature at inlet and outlet is equal to 327K and 326.6K respectively which is the result of heat transfer rate equal to 124 w for the steady cooling process. The first and the second graphs show the fins and fluid temperature as a function of position, respectively.

fin pipeMr CFD

There is a mesh file in this product. By the way, the Training File presents how to solve the problem and extract all desired results.


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