Sea Robot Motion Immersed in the Water, Dynamic Mesh Method
In this project, the moving of a robot (cube) in water is simulated.
This ANSYS Fluent project includes Mesh file and a Training Movie.
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In this project, the moving of a robot (cube) in water is simulated. The water enters the inlet boundary with a velocity of 1.5m/s while the robot moves towards this boundary with a velocity of 3m/s. The dynamic mesh model is activated and smoothing and remeshing options are enabled. Remeshing occurs every 50 iterations in order to generate a new high-quality mesh. The standard k-epsilon model is exploited to solve turbulent fluid flow equations. It should also be mentioned that the motion of robot is applied to it via a PROFILE.
Sea Robot Geometry and mesh
The geometry of this project is designed in design modeler software and meshed in ANSYS meshing. The mesh type used for this geometry is unstructured, and the element number is 30010.
Sea Robot Motion CFD simulation settings
The key assumptions considered in this project are:
- Simulation is done using pressure-based solver.
- The present simulation is transient.
- The effect of gravity is neglected.
The applied settings are summarized in the following table.
|Near wall treatment||Standard wall functions|
|Mesh methods||Smoothing & remeshing|
|Gauge pressure||0 Pa|
|Pressure velocity coupling||SIMPLE|
|Spatial discretization||Pressure||Second order|
|momentum||Second order upwind|
|Turbulent kinetic energy||First order upwind|
|Turbulent dissipation rate||First order upwind|
|gauge pressure||0 Pa|
|Turbulent kinetic energy||1 m2/s2|
|Turbulent dissipation rate||1 m2/s3|
As can be seen in velocity contour, streamlines, and velocity vectors, due to the movement of the robot (cube) towards the inlet boundary, the wake region is formed behind the cube.
Mesh file is available in this product. By the way, the Training File presents how to solve the problem and extract all desired results.