'Air duct with heating element' simulation project by AkshayMalde


#1

I created a new simulation project called 'Air duct with heating element':

Simulation of an air duct with a heated element running through it.


More of my public projects can be found here.


#3


The image above shows a clipped view of the duct with a heating element running through it as air in the laminar and turbulent regimes flow through it.

The project aims to show the difference in heat transfer between turbulent and laminar air flow. For the laminar flow regime, an inlet air velocity of 0.5 m/s was used which produces a Reynolds number of 1553.55, for this geometry this Reynolds number defines a laminar flow. For the turbulent flow regime, an air inlet velocity of 3 m/s was used which produces a Reynolds number of 9321.29, which for this geometry defines turbulent flow. The web based CAD website, Onshape, was used to create the geometry for this simulation.
The image below shows the geometry produced using Onshape. The image to the left shows the geometry with the body representing the fluid and the image to the right show the geometry without the body representing the fluid.

For this simulation the Hex-dominant parametric meshing type was used. Surface mesh refinements were made around all solid and fluid volumes, this ensured that all boundary layers and interference sections were simulated accurately. The following image shows the meshed geometry:

The analysis type used for the simulation was the conjugate heat transfer analysis method. The material used for the duct was Titanium, whilst the heating element was set as Copper… The simulation used 32 computing cores and took 20 minutes to complete the iterations, though convergence was met earlier.
The following images show the differences between the laminar and turbulent systems.


#4

@AkshayMalde - awesome work :smile: Thanks for sharing the setup and results!