# Heat Exchanger with Inner Fins CFD Simulation

\$120.00 Student Discount

The present problem is to simulate a heat exchanger using ANSYS Fluent software.

## Heat Exchanger with Inner Fins, ANSYS Fluent CFD Simulation Training

The present problem is to simulate a heat exchanger using ANSYS Fluent software. In this simulation, airflow enters the device at a velocity of 22 m.s-1 and a temperature of 313 K and exits the exchanger at a pressure equal to atmospheric pressure. For the operating mechanism of the device, it is assumed that the upper and lower surfaces of the device have a thermal boundary condition of the constant temperature type equivalent to a temperature of 323 K. Also, a curved central wall in this device with several rows of blades and fins is designed to help better airflow and better heat transfer.

This work aims to investigate the effect of high-temperature walls on the airflow temperature through the heat exchanger’s interior.

## Heat Exchanger Geometry & Mesh

The present model is designed in three dimensions using Design Modeler software. The model includes a heat exchanger with dimensions of 0.0018 m, 0.0082 m, and 0.0162 m; So that its inlet and outlet ducts are on both sides, and a curved inner wall with several rows of fins is located inside it, and its upper and lower walls are distinguished as surfaces with temperature condition.

We carry out the meshing of the model using ANSYS Meshing software, and the mesh type is unstructured. The element number is 2039783. The following figure shows the mesh.

## Heat Exchanger CFD Simulation

We consider several assumptions to simulate the present model:

• We perform a pressure-based solver.
• 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 (Heat Exchanger) Viscous k-epsilon k-epsilon model standard near wall treatment standard wall function Energy On Boundary conditions (Heat Exchanger) Inlet Velocity Inlet velocity magnitude 22 m.s-1 temperature 313 K Outlet Pressure Outlet gauge pressure 0 Pascal Solid Wall (CFD Simulation) Wall wall motion stationary wall heat flux 0 W.m-2 Heat Wall Wall wall motion stationary wall temperature 323 K Methods (Heat Exchanger) 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 (Heat Exchanger) Initialization methods Standard gauge pressure 0 pascal x-velocity & y-velocity 0 m.s-1 z-velocity 22 m.s-1 temperature 313 K

## Results

At the end of the solving process, three-dimensional and two-dimensional contours related to pressure, velocity and temperature are obtained. The contours show that the incoming air flow to the heat exchanger is affected by the hot walls and its temperature increases.

You can obtain Geometry & Mesh file and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.

## Reviews

1. Dallas Lowe

How does the simulation account for the effects of radiation?

• MR CFD Support

The current simulation primarily focuses on conduction and convection. However, we can modify the model to include radiation effects upon request.

2. Arvel Armstrong

What kind of meshing strategy was employed for the heat exchanger geometry?

• MR CFD Support

A structured meshing strategy was employed for the heat exchanger geometry. This strategy provides a high-quality mesh that is efficient for CFD simulations.

3. Hilma Schneider

Can the simulation handle different types of heat exchangers, like shell-and-tube or plate heat exchangers?

• MR CFD Support

The current model is specific to a particular type of heat exchanger, but we can modify the simulation to handle other types of heat exchangers, such as shell-and-tube or plate heat exchangers. We are open to contributions and can accommodate your specific requirements.