Tank Discharge CFD Simulation, Ansys Fluent Training

$80.00 Student Discount

In this project, the Rectangular Tank’s water discharge has been simulated and the results have been investigated.

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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.
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Geometry, Mesh, and CFD Simulation methodologygy explanation, result analysis and conclusion
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Tank Discharge Project Description

The current project simulates the water discharge of a rectangular tank under the influence of gravity by Ansys Fluent software. The VOF model has been used to simulate and solve the two-phase flow field equations. The computational domain consists of three tanks that are connected by pipes.

Geometry & Mesh

The 2-D geometry of the present model is generated using Design Modeler software. The primary tank is a 229.4* 157.7 mm rectangular, the second tank is an eight-sided polygon with a side length of 51.3 mm, and the third tank is also a 229.4* 100 mm rectangular.

Cfdpost 8361

. The meshing of this project has been done using Ansys Meshing software. The mesh type is unstructured, and the element number is equal to 15,310.

Cfdpost 8360

Tank Discharge CFD Simulation Settings

We consider several assumptions to simulate the present model:

  1. Due to the incompressibility of the flow, the pressure-based solver method has been selected.
  2. The simulation is transient.
  3. The gravity effect is considered equal to -9.81 m.s-1 on Y-axis

The Laminar viscous model has been used to solve the flow field equations, and the pressure-velocity coupling scheme is SIMPLE. The second-order upwind discretization method has been used for momentum and PRESTO! For the pressure discretization.

The following tables represent a summary of the defining steps of the problem in this project and its solution:

Homogeneous model Volume of fluid
Number of Eulerian phases 2(air& water)
Interface modeling Sharp

Interfacial Anti-Diffusion

Formulation Implicit
Body force formulation Implicit body force
Viscous Laminar
Material Properties
Density 1.225
viscosity 1.7894e-05
Density 998.2
viscosity 0.001003
Pressure-Velocity Coupling SIMPLE
  Pressure PRESTO!
  Momentum Second-order upwind
Volume fraction Compressive
Cell registers
Input coordinates
  X Min [m] 0.08
  X Max[m] 0.379
Y Min [m] 0.2264246
Y Max [m] 0.33
Initialization methods Standard
Patch Phase Phase2
  Variable Volume Fraction
Registers to patch Region_0
Value 1
Run calculation
Time advancement Type adaptive
Initial time step size 1e-05
Settings Minimum time step size 1e-05
Maximum time step size 0.001
Time step size 10000

Tank Discharge Results

After the solution process is completed, contours of Volume fraction, Pressure, Velocity, and Streamlines are extracted and presented below. As can be observed, the water discharges from the primary tank to the secondary tank, which has insufficient volume for storing water. After a while, water starts to fill the third tank, connected to the second tank. Some pipes are for air circulation inside the tanks. This phenomenon can be seen in the velocity and streamline contours.

1 review for Tank Discharge CFD Simulation, Ansys Fluent Training

  1. Avatar Of Rebecca


    VOF simulations are stunning! Thank you for that.

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