Vertical Heat Exchanger, CFD Simulation Ansys Fluent Training

$59.00

In this project, a Vertical Heat Exchanger has been simulated, and the results of this simulation have been investigated.

This product includes Geometry & Mesh file and a comprehensive Training Movie.
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Description

Vertical Heat Exchanger Description

The present simulation is about heat transfer in a vertical heat exchanger via ANSYS Fluent. A Heat exchanger is an industrial equipment whose main task is to heat transfer between its hot and cold sides. In this project, a vertical shell and tube heat exchanger are modeled.

The fluid used in this heat exchanger is liquid sodium. Sodium flow with a temperature of 900 K and a velocity of 1.5 m / s inside the helical tubes moves from the top of the heat exchanger to the bottom.

Sodium flow with a temperature of 400 K and a velocity of 1.5 m / s inside the cylindrical shell of the heat exchanger moves from down to the top.

The thermophysical properties of liquid sodium are defined as a function of temperature. Thus, density, specific heat capacity, thermal conductivity, and viscosity change at different temperatures.

Geometry & Mesh

The present geometry is designed in a 3D model via Design Modeler. The computational zone is the interior space of a heat exchanger. This heat exchanger is shell and tube type; It consists of a vertical cylindrical shell with a spiral tube inside.

heat exchanger

The mesh of the present model has been done via ANSYS Meshing. Mesh is done unstructured, and the number of production cells is equal to 640618.

heat exchanger

Set-up & Solution

Assumptions used in this simulation  :

  • Pressure-based solver is used.
  • The present simulation is steady.
  • The effect of gravity is ignored.

 

Models
Viscous k-epsilon
k-epsilon model RNG
Near-wall treatment standard wall function
Energy On
Boundary conditions
Inlet (shell) Velocity Inlet
velocity magnitude 1.5 m.s-1
temperature 400 K
Inlet (tube) Velocity  Inlet
velocity magnitude 1.5 m.s-1
temperature 900 C
Walls (inner) Wall
wall motion stationary wall
thermal condition coupled
Walls (outer) Wall
wall motion stationary wall
heat flux 0 W.m-2
Outlet (shell) Pressure Outlet
gauge pressure 0 pascal
Outlet (tube) Pressure Outlet
gauge pressure 0 pascal
Methods
Pressure-Velocity Coupling coupled
pressure Second-order
momentum Second-order upwind
energy Second-order upwind
turbulent kinetic energy First-order upwind
turbulent dissipation rate First-order upwind
Initialization
Initialization methods hybrid

Vertical Heat Exchanger Results

After calculation, 2D and 3D contours related to temperature, pressure, and velocity are obtained. The contours show that heat transfer occurs between the shell (with lower temperature) and the tube (with higher temperature). In this way, liquid sodium flow inside the tube is cooled, and liquid sodium flow inside the shell is heated.

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

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