Mountain External Airflow CFD Simulation
The purpose of this project is to study the airflow and heat transfer on the surface of the mountain.
This ANSYS Fluent project includes CFD simulation files and a training movie.
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The study of natural phenomena has always been of interest to researchers. The purpose of this project is to study the airflow and its heat transfer on the surface of the mountain that it encounters in the passage, which is also effective in determining the air passage for the aircraft.
In this project, the air enters the computational domain with the velocity and temperature of 8 m/s and 297.5 K, respectively. The energy model is activated. Due to the nature of the flow, which is of the external flow type, and considering the airflow velocity, which has consequences such as flow separation, and vortexes behind the mountain, the K-epsilon Standard model has been used to analyze the turbulent flow.
Mountain Geometry and Mesh
The geometry of this model is designed in ANSYS design modeler® and is meshed in ANSYS meshing®. The computational domain consists of an airflow inlet, the mountain itself and 3 different pressure-outlets (including top and side walls), and the main outlet. The mesh type used for this geometry is unstructured and the element number is 1250044.
External Airflow around a Mountain CFD Simulation
The key assumptions considered in this project are:
- Simulation is done using pressure-based solver.
- The present simulation and its results are transient. 16 time steps with a step size of 7 seconds are exploited for this simulation.
- The effect of gravity has not been taken into account.
The applied settings are summarized in the following table.
|near wall treatment||standard wall function|
|turbulent Intensity||5 %|
|Turbulent Viscosity Ratio||10|
|Gauge pressure||0 Pa|
|Backflow temperature||297.5 K|
|Backflow turb. Intensity||5 %|
|Backflow turb. Visc. Ratio||10|
|Walls||wall motion||stationary wall|
|Mountain surface||Temperature||300 K|
|Bottom surface||Heat flux||0 W/m2|
|Spatial discretization||pressure||Second order|
|momentum||second order upwind|
|energy||second order upwind|
|Turbulent kinetic energy||First order upwind|
|Turbulent dissipation rate||First order upwind|
|gauge pressure||0 Pa|
|velocity (x,y,z)||(0,8,0) m/s|
|Turbulent kinetic energy||0.24 m2/s2|
|Turbulent dissipation rate||35.48899 m2/s3|
Contours of pressure, velocity, temperature, streamlines and velocity vectors are presented.
All files, including Geometry, Mesh, Case & Data, are available in Simulation File. By the way, Training File presents how to solve the problem and extract all desired results.