CFD simulation on Gear box
Gearbox
house assemble of gears the rotation of gears can be studied to find the sloshing effect of multiphase materials
slosh
slosh refers to the movement of liquid inside another object (which is, typically, also undergoing motion). Strictly speaking, the liquid must have a free surface to constitute a slosh dynamics problem, where the dynamics of the liquid can interact with the container to alter the system dynamics significantly
Gearbox model analysis on 4 cases which is explained below
|
Cases |
phase-2 Material |
|
Case 1a |
oil |
|
Case 1b |
water |
|
Case 2a (model geometry offset in position) |
oil |
|
Case 2b (model geometry offset in position) |
water |
Properties of Oil:
Density: 871 kg/m^3
Viscosity: 0.04006889 kg/ms
Properties of water:
Density: 871 kg/m^3
Viscosity: 0.04006889 kg/ms
Base model
case 1 a,b
fluid volume Extracted
case 1 a,b
Base model
case 2 a,b
fluid volume Extracted
case 2 a,b
mesh
case 1 a,b
case 2 a,b
Setup
General
gravity enable y=-9.81
pressure based
transient
viscose
k-epsilon turbulent modelling
material
oil, water
to run on a different case
phases
phase-1-air
case 1a
phase2-oil
case 1b
phase2-water
which is same as followed as for case 2
UDF
angular velocity for both gears is created in .c format
Right motion
omega[2] = 2.0e2
left motion
omega[2] = -2.0e2
which can be created with the help of Ansys help file as a template
note: In my case which was provided by skill lynk team
this file is read in
function-build-load
Mesh adopt
adoption control- cell Registration- adopt- click region to adopt
Region adopt the mesh region
Initialize
standard-whole model
patch
case1a
phase-2(oil)-volume-Region
case1b
phase-2(water)-volume-Region
case2a
phase-2(oil)-volume-Region
case2b
phase-2(water)-volume-Region
Dynamic mesh
smoothness
Remesh
local mesh on
set
min as zero, max which can be view on default mesh option
to obtain a smooth mesh
calculation
time step size=1e-5
no-time step=2500
Result
Residuals
Case1a
Case1b
Case2a
Case2b
Animation
Case1a
Case1b
Case2a
Case2b
Source
Skill lynk