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Finned Tube Radiator Heat Transfer CFD Simulation

$90.00 $12.00

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The present problem simulates heat transfer inside a finned tube radiator using ansys fluent software.

This ANSYS Fluent project includes CFD simulation files and a training movie.

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Description

Project Description

The present problem simulates heat transfer inside a finned tube radiator using ansys fluent software. The working mechanism of these radiators is such that the flow of hot water passes through the pipes inside the radiator and on the other hand, the air flow also passes through the pipes. In this way, the air flow passes through the pipes carrying the hot flow, receiving their heat, and as a result, hot air flow is transferred to the outside environment. In this simulation, hot water flows at a speed of 0.1 ms-1 and a temperature of 343.15 K flows through three pipes inside the radiator, and air flows at a speed of 3 ms-1 and a temperature of 293.15 K from It passes over this pipe.

To increase the amount of heat transfer inside the radiator, the amount of contact surface between cold air and hot water flow has been increased by using fins, and as a result, 22 rows of fins have been installed on each pipe carrying hot water flow. The purpose of this work is to investigate the quality of heat transfer inside the radiator by applying fins on the inner pipes.

Finned Tube Radiator Geometry & Mesh

The present model is designed in three dimensions using Design Modeler software. The model includes a symmetrical radiator, which is semi-drawn due to its symmetrical geometric structure and in order to avoid heavy calculations. This radiator has air inlet and outlet sections on both sides. Also inside this radiator, three pipes have been designed for the passage of water flow. On the body of each of the internal pipes, 22 rows of fins are used.

finned tube radiator

The meshing of the model has been done using ANSYS Meshing software and the mesh type is unstructured. The element number is 2120802 . The following figure shows the mesh.

finned tube radiator

Finned Tube Radiator CFD Simulation

To simulate the present model, several assumptions are considered:

  • 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
Viscous k-epsilon
k-epsilon model standard
near wall treatment standard wall functions
Energy On
Boundary conditions
Inlet – Air Velocity Inlet
velocity magnitude 3 m.s-1
temperature 293.15 K
Inlet – Water Velocity Inlet
velocity magnitude 0.1 m.s-1
temperature 343.15 K
Outlet – Air Pressure Outlet
gauge pressure 0 pascal
Outlet – Water Pressure Outlet
gauge pressure 0 pascal
Internal Walls Wall
wall motion stationary wall
thermal condition coupled
Fin Walls Wall
wall motion stationary wall
thermal condition coupled
Bottom Wall Wall
wall motion stationary wall
heat flux 0 W.m-2
Methods
Pressure-Velocity Coupling Coupled
Pressure second order
momentum first order upwind
energy second order upwind
turbulent kinetic energy second order upwind
turbulent dissipation rate second order upwind
Initialization
Initialization methods Hybrid

Results

At the end of the solving process, two-dimensional and three-dimensional contours related to pressure, velocity, and temperature are obtained.

All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, Training File presents how to solve the problem and extract all desired results.

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