Tank Filling CFD Simulation, 3-phase, ANSYS Fluent Training

$121.00 Student Discount

In this project, Tank Filling with three phases (VOF) has been simulated and the results have been investigated.

This product includes Geometry & Mesh file and a comprehensive Training Movie.
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The journal file in ANSYS Fluent is used to record and automate simulations for repeatability and batch processing.
editable geometry and mesh allows users to create and modify geometry and mesh to define the computational domain for simulations.
The case and data files in ANSYS Fluent store the simulation setup and results, respectively, for analysis and post-processing.
Geometry, Mesh, and CFD Simulation methodologygy explanation, result analysis and conclusion
The MR CFD certification can be a valuable addition to a student resume, and passing the interactive test can demonstrate a strong understanding of CFD simulation principles and techniques related to this product.


Tank Filling Project Description

The current project simulates the tank filling by Ansys Fluent software. The goal of many operations in the chemical industry is to separate the components of a solution or mixture from each other or to obtain a pure substance from a combination of two or more components. In this Tank Filling simulation,  using the VOF (volume of fluid) method, the interaction of three phases, including water, alcohol, and air was investigated. For this purpose, the effect of shear forces on the boundary between the phases was applied by applying surface stresses between the two phases. Water enters the domain through a 10 cm side valve at a speed of 1 m / s, and the interaction of the phases was investigated by comparing different contours.


Geometry & Mesh

The computational domain was designed using Design Modeler software, and its dimensions were a cube with a side of 1 meter. A square valve with a side of 10 cm in the wall was designed to allow water to flow into the domain. In the beginning and before starting to solve the problem, there was 40 cm of alcohol in the bottom of the container


Ansys Meshing software was used for grid generation, and the type of problem elements was structured. Also, the total number of elements was about 421,000.

Tank Filling CFD Simulation

To simulate the present model, several assumptions are considered, which are:

  • Due to the incompressibility of the flow, the pressure-based solver method has been selected.
  • The simulation is transient.
  • The gravity effect is considered equal to -9.81 m.s-2 on Y-axis
  • All thermodynamic properties of fluids, including density, were assumed to be constant.

The VOF (Volume of Fluid) model is used to simulate non-mixing biphasic flows and is generally used to simulate the interface of two fluids. In other words, the VOF model will be highly efficient when the goal of the simulation is to study the interface between two fluids. In the software, the equations of each phase were solved discretely along with the  RANS and turbulence equations.

The following is a summary of the steps for defining the problem and its solution:

Material Properties
Amount Fluid properties
998.2 Density (kg/m3)
Amount Fluid properties
790 Density (kg/m3)
Amount Fluid properties
1.225 Density (kg/m3)
Homogeneous model VOF (volume of fluid)
Number of Eulerian phases 3 (water-alcohol-air)
Interface modeling sharp
Formulation Explicit
Phase interaction
Fluid type Surface tension coefficient (N/m)
Water-air 0.072
Alcohol-water 0.043
Air-alcohol 0.022
Boundary Condition
Type Amount (units)
Velocity inlet 1 m/s
pressure outlet (gauge pressure) 0 pa
Cell zone condition
Fluid mixture
Turbulence models
K-epsilon  viscous model
Realizable K- model
Standard wall functions Wall function
Solution methods
SIMPLE pressure velocity coupling
PRESTO pressure spatial discretization
Second-order upwind momentum
First-order upwind turbulent kinetic energy
First-order upwind      turbulent dissipation rate
Volume fraction      Geo-reconstruct

Tank Filling Results

In this section, first, the velocity counters at 1 and 15 seconds after solving were given below. As can be seen in the attached animation, as the volume of water in the tank increases, the alcohol phase moves upwards, and due to the non-mixing of water and alcohol, the separation operation can be performed by placing a drain valve under the tank.

You can obtain Geometry & Mesh file and a comprehensive Training Movie that presents how to solve the problem and extract all desired results.


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