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Radiator, Aluminum Fin, Hot Water, U-Shaped Tube, ANSYS Fluent Training

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The present problem simulates the performance of a radiator using ANSYS Fluent software.

This product includes a Mesh file and a comprehensive Training Movie.

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Description

Project Description

The present problem simulates the performance of a radiator using ANSYS Fluent software. In this modeling, a two-way pipe made of aluminum is designed; So that the water flow inside a U-shaped tube moves in a two-way direction in the radiator. Water flow with a velocity of 1.4 m.s-1 and a temperature of 343.15 K enters the U-shaped tube and exits at a pressure equal to atmospheric pressure. The outer body and the aluminum fins of the radiator have convection heat transfer with their surroundings. The ambient temperature equals 290 K, and the heat transfer coefficient is equal to 10 W.m-2.K-1. Therefore, the radiator uses the water flow heat inside the U tube to transfer heat to the low-temperature environment by conduction and convection.

Radiator Geometry & Mesh

The present model is designed in three dimensions using Design Modeler software. This model is related to a radiator; So that a reciprocating U-shaped tube is placed inside the aluminum fins of the radiator.

radiator

We carry out the model’s meshing using ANSYS Meshing software. The mesh type is structured. The element number is 759660. The following figure shows the mesh.

radiator

Radiator CFD Simulation

We consider several assumptions to simulate the present model:

  • We perform a pressure-based solver.
  • The simulation is steady.
  • The gravity effect on the fluid is ignored.

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

Models (Radiator)
Viscous k-epsilon
k-epsilon model standard
near wall treatment standard wall function
Energy On
Boundary conditions (Radiator)
Inlet Velocity Inlet
velocity magnitude 1.4 m.s-1
temperature 343.15 K
Outlet Pressure Outlet
gauge pressure 0 pascal
Inner Wall Wall
wall motion stationary wall
thermal condition coupled
Outer Wall Wall
wall motion stationary wall
thermal condition convection
heat transfer coefficient 10 W.m-2.K-1
free stream temperature 290 K
Methods (Radiator)
Pressure-Velocity Coupling SIMPLE
pressure second order
momentum second order upwind
turbulent kinetic energy first order upwind
turbulent dissipation rate first order upwind
energy second order upwind
Initialization (Radiator)
Initialization methods Standard
gauge pressure 0 pascal
velocity (x,y,z) 0 m.s-1
temperature 300

Results & Discussion

After the solution process, two-dimensional and three-dimensional contours related to pressure, velocity, and temperature are obtained, and temperature and heat flux contours on the outer surface of the radiator U-shaped tube. The contours show that the high temperature of the water flowing inside the pipe causes heat transfer with the cold aluminum fins, and the temperature of the fins increases due to the conduction heat transfer, and then the hot fins transfer heat to the cold environment by convection.

There are a Mesh file and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.

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