Monometer CFD Simulation by Ansys Fluent, Training

$120.00 Student Discount

In this project, a monometer has been simulated, and the results of this simulation have been investigated.

Special Offers For Single Product

If you need the Geometry designing and Mesh generation training video for one product, you can choose this option.
If you need expert consultation through the training video, this option gives you 1-hour technical support.
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.


Monometer Project Description

In this project, we study a Monometer CFD Simulation by Ansys Fluent, and it has been shown how there is variation in U-tube manometric fluid column. The multiphase  VOF model has been used. A convergent and divergent nozzle has been used to create a pressure difference. One end of the manometer is attached at the throat, and the other at the converging section. There is a rise in the liquid column in the U- tube manometer at the low-pressure region.

Monometer CFD Simulation by Ansys Fluent

Manometers are pressure measurement devices that are commonly used in everyday life. For example, pressures in piping systems are constantly monitored using these devices. The U-tube manometer is a special manometer that gets its name from its U-shaped tube. The straight portions of this U are commonly referred to as the manometer’s arms, limbs, or ends. The manometer is typically filled with a dense, colored fluid called the manometer fluid, which is used to visualize the pressure difference between the two ends of the tube. As the pressure at one of its ends increases, the manometer fluid inside the tube is pushed downward at that end.

This causes the manometer fluid to rise at the other end of the device. The difference in the fluid levels between the two ends is then used to measure the pressure difference. When used properly, the manometer, one of the earliest pressure-measuring instruments, is very accurate.   The manometer has no moving parts subject to wear, age, or fatigue. Manometers operate on the Hydrostatic Balance Principle: a liquid column of known height will exert a known pressure when the weight per unit volume of the liquid is known.

Geometry & Mesh

The 2-D geometry of the present model is generated using Design Modeler software.


The meshing of the present model has been done using Ansys Meshing software. The mesh type is unstructured in all of the computational domains, and the element number is equal to 42413.

Ansys Meshing

CFD Simulation

To simulate the present model, we consider several assumptions:

  • The solver is pressure-based.
  • The current simulation is unsteady in terms of time.
  • The gravity effect is equivalent to -9.81 m.s-1.

Here is a summary of the steps for defining the problem and its solution in the following table:










Homogeneous model Volume of fluid



Number of Eulerian phases 2(air& mercury)



Interface modeling Sharp


Formulation explicit



Body force formulation Implicit body force

Viscous model



Material Properties








Density 1.225



viscosity 1.7894e-05






Density 13529



viscosity 0.001523
Boundary conditions
Inlet air


Velocity inlet
volume fraction





velocity magnitude 1.8 m.s-1
Outlet Pressure outlet

gauge pressure



0 Pascal




air backflow volume fraction





Solution Method

Pressure-velocity coupling





Spatial discretization









first-order upwind






Volume fraction



Geo reconstruct





Turbulent kinetic energy


First-order upwind





Turbulent dissipation rate



First-order upwind


Initialization method


















Volume Fraction





Registers to patch










Run calculation
Time step size  


Max iterations/time step  



Number of time steps



Monometer Results

First, a volume fraction diagram was drawn in different positions in this simulation. Then two-dimensional contours related to density, streamline, air volume fraction and mercury volume fraction were obtained. The images show that Initially, the height of the liquid column is equal on both sides. But as the gas enters the manometer, the height of the mercury column changes.



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