Surface Evaporation of a Falling Water Droplet, ANSYS Fluent CFD Training

$270.00 Student Discount

  • The problem numerically simulates the surface evaporation of a falling water droplet using ANSYS Fluent software.
  • We design the 2-D model by the Design Modeler software.
  • We Mesh the model by ANSYS Meshing software.
  • The mesh type is Structured, and the element number equals 94800.
  • We perform this simulation as unsteady (Transient).
  • We use the Mixture Multi-Phase Model to define droplets inside the air.
  • We use a UDF to define surface evaporation as the Mass Transfer rate between water and air.
Click on Add To Cart and obtain the Geometry file, Mesh file, and a Comprehensive ANSYS Fluent Training Video. By the way, You can pay in installments through Klarna, Afterpay (Clearpay), and Affirm.

To Order Your Project or benefit from a CFD consultation, contact our experts via email ([email protected]), online support tab, or WhatsApp at +44 7443 197273.

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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.



This simulation is about the surface evaporation of a falling water droplet via ANSYS Fluent software. We perform this CFD project and investigate it by CFD analysis.

In this project, the surface evaporation process of a water droplet into the air space is investigated. The purpose of the simulation is to investigate the droplet behavior during the falling and the amount of vapor produced in the air due to the water surface evaporation.

The time taken to process the downward movement of water within the air space is assumed to be 12 seconds. No external factor as a boundary condition affects the drop, and the downward movement is based solely on the force of gravity.

The geometry of the present model is drawn by Design Modeler software. The model is then meshed by ANSYS Meshing software. The model mesh is structured, and 94800 cells have been created.

Surface Evaporation Method

In this simulation, there are three phases of water, air, and vapor in the computational area. Therefore, the Multiphase model is used to model the primary phase of air and the secondary phases of water and water vapor.

The Mixture model is used to define the multiphase model. This model is more complex than VOF and mixture models. As water droplets evaporate in space, the phenomenon of mass transfer between the two phases of water and vapor should be used.

As the evaporation of the present model is not boiling, we use surface evaporation. The major difference between boiling and surface evaporation is that boiling occurs when the water temperature reaches saturation temperature.

In contrast, surface evaporation can occur at a lower temperature than the saturation temperature, and it happens at the surface temperature of the liquid. We use the Evaporation-Condensation type mass transfer to define surface evaporation, whereas, in the present model, we use the UDF code to define surface evaporation.

Surface Evaporation Result

After simulation, the contours of temperature, velocity, and pressure are obtained. Also, contours of mass fraction of water, air, and vapor are obtained. After simulation, the contours of temperature, velocity, and pressure are obtained.

Also, contours of mass fraction of water, air, and vapor are obtained. The contours show that the water droplet is moving downwards due to gravity. After moving downwards, the droplets gradually evaporate to the surface, and as a result, the vapor is generated.


  1. Mrs. Mina Lynch

    Can this simulation be customized to model the evaporation of other types of droplets?

    • MR CFD Support

      Yes, we can accommodate your desired simulations. Please share more details about your specific requirements.

  2. Ms. Sadye Gutmann IV

    How does the simulation model the evaporation process?

    • MR CFD Support

      The simulation uses the mass transfer model in ANSYS Fluent to simulate the evaporation process. It takes into account the heat and mass transfer between the water droplet and the surrounding air.

  3. Devonte Feil

    What is the benefit of using CFD for analyzing the evaporation process?

    • MR CFD Support

      CFD allows for detailed analysis of the evaporation process, providing insights into the heat and mass transfer phenomena that cannot be easily obtained through experiments.

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