'Milk Packaging' simulation project by vgon_alves


#1

I created a new simulation project called 'Milk Packaging':

That funny project aims to evaluate the turbulence profile in 3 different types of milk carton. This design can serve as a basis to assist you in designing cases with solid body rotation and fluid behavior.


More of my public projects can be found here.


#2

Milk Packaging

The purpose of this project is just helps you to set a CFD simulation with a rotating body and analyse the turbulence acting on the fluid due to the moviment. Here 3 different types of boxes will aim to analyse the splash effect when turning a milk carton. This effect occurs because the liquid outlet is the same place that the air intake in the carton (box).

Geometries

The CAD models was designed by the author and uploaded in STEP format.

  • Dimensions: 7x7x20 [cm]


Figure 1: Gemetries

Meshes

Hex-dominant parametric algorithm with 3 reffinements in different surfaces.


Figure 2: Meshes

Simulation

  • Each package has the capacity to store in avarage 1 [L]

  • Start vetically with stationary state until 120 degrees

  • Was considered 1 [s] to reach the maximum angulation

  • k-omega SST

  • Multiphase flow: Milk + Air (Euler)

  • Milk: Kinematic viscosity [m²/s] = 9.669e-7, Density [kg/m³] = 1035

  • Constant phisical properties

  • Transient simulation (Time-step length: 0.005 s)

  • Total analysis: 3 seconds

Results

  • Residuals under 10e-3
  • CourantMax Avarage is 2,1

,
The geometry 1 (Box 1) was the highest pressure overall, the second is the Box 2, and the lowest pressure is acting in Box 3. These results explains the rowdy flow in each box, being that the turbulence in Box 2 is pretty similar when you compare with Box 1. Therefore, because it has the smaller pressure, the Box 3 is the most recomended if you want to minimize the splash effect of the fluid.


Figure 3: Pressure in the packages in the maximum angulation (120 degrees).


Figure 4: Pressure over the cells in the top of packages in the maximum angulation (120 degrees).


Figure 5: Turbulence in the fluid outlet / air inlet for each box.


Figure 6: Turbulence in the center of the fluid outlet / air inlet (Slice).


#3

It might be interesting to see what happens if you add air-holes to each. Does it help like we would expect it to?
Nice analyses :smiley:


#4

Nice idea @wildejon!

Would be really nice to know :smiley:

Best,

Jousef


#5

Nice idea @wildejon!
I would encourage you to do that and if you need any help with it, please tag me and @jousefm!

Cheers,

Vinícius


#6

Another nice job, @vgon_alves! :slight_smile: