Cylindrical Heat Source CFD Simulation by ANSYS Fluent
In this project, steady heating process of air flow in a cylindrical geometry is investigated.
This ANSYS Fluent project includes CFD simulation files and a training movie.
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In this project, steady heating process of air flow in a cylindrical geometry is investigated. air flows in the hollow space between two concentric cylinders while constant heat source equal to 252972 W/m3 heats up the air. Air enters and exits the domain with temperature equal to 300K and 1758K respectively.
Cylindrical Heat Source Geometry & Mesh
Geometry of fluid domain is designed in Design Modeler and computational grid is generated using Ansys Meshing. Mesh type is unstructured and element number is 1600000.
Solver configuration for the Heating CFD Simulation
- Solver type is assumed Pressure Based.
- Time formulation is assumed Steady.
- Gravity effects is neglected.
The following table a summary of the defining steps of the problem and its solution.
|Fluid||Definition method||Fluent Database|
|Solid||Definition method||Fluent Database|
|Cell zone conditions|
|Source term type||Energy|
|Number of energy sources||1|
|Heat source magnitude||252972 W/m3|
|Mass flow inlet||Type||Mass flow inlet|
|Mass flow rate||2.315382e-6 kg/s|
|Spatial discretization||Gradient||Least square cell-based|
|Momentum||Second order Upwind|
|Energy||Second order Upwind|
|Initialization||Gauge pressure||0 Pa|
|X velocity||0 m/s|
|Y velocity||0 m/s|
|Z velocity||-0.008784838 m/s|
Results & Discussion
Air flow average velocity at inlet and out location is 0.00878484 m/s and 0.0353417 m/s respectively. This significant rise in velocity magnitude is due to reduction of cross-sectional area of flow. Air temperature at inlet and outlet is equal to 300K and 1759K respectively which is the result of heat transfer rate equal to 3.4 W/m2. In the chart , fluid temperature is shown with respect to Z increase in flow direction. It can be seen that the most major heat transfer to fluid is done in the first few centimeters of the pipe.
All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, the Training File presents how to solve the problem and extract all desired results.