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Nanofluid Flow in a Wave Sine Channel, Heat Transfer Analysis, ANSYS Fluent

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The present problem simulates the wave motion of a nanofluid within a sinusoidal channel 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 wave motion of a nanofluid within a sinusoidal channel using ANSYS Fluent software. The nanofluid current in the channel is defined as Al2O3-water; So that it has nanoparticles with a volume fraction of 1%. According to the following equations, the thermophysical properties of the nanofluid material are obtained, and the amount of thermophysical properties of water fluid and nanoparticles is defined according to the data in the table below. The nanofluid flow enters the channel at a temperature of 300 K; While due to the wavy structure of the geometry, the value of the horizontal velocity of the input current is a function of the vertical direction. This horizontal flow velocity function is defined as follows and is compiled to the software as a UDF.

Also, in terms of thermal boundary conditions, the lower wall of the channel has a constant heat flux equal to 320 W.m-2, and the upper wall of the channel has a constant temperature equal to 320 K.

nanofluid

Geometry & Mesh

The current model is designed in two dimensions using Design Modeler software. The present model is a two-dimensional channel with sinusoidal walls. The canal length is equal to 4 m, and its width is equal to 1 m. So that its wavelength is equal to 2 m, and the height of each peak or bottom is equal to 0.4 m.

nanofluid

We carry out the model’s meshing using ANSYS Meshing software. The mesh type is structured. The element number is 18768. The following figure shows the mesh.

nanofluid

Nanofluid 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
Viscous   Laminar
Energy   On
Boundary conditions
Inlet   Velocity Inlet
  velocity magnitude UDF
  temperature 300 K
Outlet   Pressure Outlet
  gauge pressure 0 pascal
Up Wall   Wall
  wall motion stationary wall
  Temperature 320 K
Down Wall   Wall
  wall motion stationary wall
  Heat Flux 320 W.m-2
Methods
Pressure-Velocity Coupling   Coupled
  pressure second order
  momentum second order upwind
  energy second order upwind
Initialization
Initialization methods   Standard
  gauge pressure 0 pascal
  x-velocity 0.0015 m.s-1
  y-velocity 0 m.s-1
  temperature 300 K

Nanofluid Results

At the end of the solution process, two-dimensional contours related to temperature, pressure, and velocity are obtained. The graph of pressure and velocity changes along a hypothetical horizontal line passing through the middle of the channel is also obtained.

nanofluidnanofluid

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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