Eulerian Two Phase Flow within a Convergent-Divergent Channel, ANSYS Fluent

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  • The problem numerically simulates the Two-Phase Flow within a Convergent-Divergent Channel using ANSYS Fluent software.
  • We design the 3-D model with the Design Modeler software.
  • We mesh the model with ANSYS Meshing software.
  • The mesh type is Structured, and the element number equals 175500.
  • We use the Eulerian Multiphase model to define the two-phase flow.


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The problem simulates two-phase flow as soluble particles in a given fluid in a channel with a convergent-divergent structure by ANSYS Fluent software.

The current model is designed in three dimensions using Design Modeler software. The model consists of a channel with a rectangular cross-section with dimensions of 0.001 m * 0.0002 m, which in its longitudinal direction, the geometric structure of the model becomes convergent-divergent.

The meshing of the present model has been done using ANSYS Meshing software. The mesh type is structured, and the element number is equal to 175,500.

Eulerian Methodology

The Eulerian multiphase model has been used to simulate the present model. The Eulerian multiphase model is considered the most complex model for defining multiphase flows.

This model solves a set of momentum and conservation equations for each phase separately, While the multiphase mixture and VOF methods only solve the equations for phases other than the initial phase.

We apply the Eulerian model in applications such as bubble columns, droplet flows, particle-laden flows with a volume fraction greater than ten percent, pneumatic transitions for granular liquid flows, fluidized beds for solid-gas slurry flows, particle suspension and sedimentation phenomena as solid-liquid flows.

In this simulation, the base fluid is defined as a liquid with a density of 1050 kg/m3 and a viscosity of 0.000024997 kg/m.s, and the secondary fluid in the form of particles with a density of 1050 kg/m3 and a viscosity of 1. kg/m.s is defined.

The type of particle dispersion in the base liquid is defined in granular form, and the particle diameter is defined as 0.00002 m. The base fluid and its soluble particles enter this channel at a rate of 0.007142 m/s.

Eulerian Conclusion

At the end of the solution process, two-dimensional and three-dimensional contours related to the mixing pressure, base fluid velocity, soluble particle velocity, and volume fraction of soluble particles are obtained.

As it is obvious, the maximum velocity occurs in the throat zone since the cross-section is minimum in this section.


  1. Avatar Of Yadira Wisoky

    Yadira Wisoky

    The detailed simulation of the convergent-divergent channel is impressive. It has provided clear insights into complex fluid dynamics and the effects of channel geometry on flow patterns.

    • Avatar Of Mr Cfd Support

      MR CFD Support

      Thank you for your kind words! We’re pleased to hear the simulation exceeded your expectations and offered you valuable insights. We pride ourselves on delivering in-depth analyses that help our customers understand the intricacies of fluid behaviors. If you have any further questions or need assistance with similar projects, please do not hesitate to reach out!

  2. Avatar Of Violet Gislason

    Violet Gislason

    I’m impressed with the details of this simulation. What specific insight into multicomponent mixing does this type of simulation provide?

    • Avatar Of Mr Cfd Support

      MR CFD Support

      The administrative team at MR CFD appreciates your positive feedback! This type of simulation can provide detailed insight into the behavior of multicomponent mixing processes. Factors such as mixing efficiency, flow patterns, the interaction between different phases, and zones of high concentration or velocity can be analyzed. Understanding these parameters helps in optimizing industrial processes where different materials are combined, ensuring uniform mixing and minimizing material waste.

  3. Avatar Of Lorna Nicolas

    Lorna Nicolas

    I was truly intrigued by this experiment’s ability to predict particle behavior. Could these findings extend to multimaterial injection systems? Would it help in optimizing those processes?

    • Avatar Of Mr Cfd Support

      MR CFD Support

      Absolutely, the insights gained from the simultaneous flow analysis of particles and a liquid base in this type of channel geometry can be applied to enact improvements in multimaterial injection systems. By understanding the localized variances in particle-laden flow, such systems can be carefully calibrated to ensure even distribution and minimize risk of clogging or uneven mixing, which is pivotal in optimizing injection processes across various industries.

  4. Avatar Of Lorna Paucek

    Lorna Paucek

    The tutorial on Eulerian two-phase flow within a convergent-divergent channel was excellent. It really clarified how the multiphase model works, and the visuals helped to understand the flow dynamics in each section of the channel. Great material for a deeper grasp of CFD applications.

    • Avatar Of Mr Cfd Support

      MR CFD Support

      Thank you for the positive feedback on our Eulerian two-phase flow simulation tutorial! We’re thrilled to hear that our materials and visual aids have helped enhance your understanding of multiphase models and CFD applications. Your satisfaction is very important to us, and we appreciate your compliment.

  5. Avatar Of Miss Kendra Russel Sr.

    Miss Kendra Russel Sr.

    I’m truly amazed by the level of detail of the flow patterns depicted in the contours. Well done in showcasing the effects at the throat zone clearly.

    • Avatar Of Mr Cfd Support

      MR CFD Support

      Thank you for your positive feedback! We’re delighted to hear that you found the detailed representation of flow patterns and their effects in the throat zone clear and informative. Our team strives to provide high-quality and precise simulations, and it’s rewarding to know that our efforts resonate with our customers. If there’s anything else you’re curious about or any further assistance you need, we’re always here to provide support!

  6. Avatar Of Kailee Ebert

    Kailee Ebert

    The results provided by MR CFD’s simulation on the Eulerian two-phase flow within a convergent-divergent channel using ANSYS Fluent were truly insightful. Having access to the detailed pressure and velocity contours as well as the particle volume fraction delivered the clarity needed for understanding complex interactions within the flow domain. It’s commendable how accurately the behavior of soluble particles in the convergent-divergent structure of the channel was captured, particularly the sharp increase in velocity at the throat section. This indicates a thorough and well-executed simulation process.

    • Avatar Of Mr Cfd Support

      MR CFD Support

      We’re glad you found the simulation results insightful and commendable! It’s always our goal to ensure that complex fluid dynamics phenomena are accurately represented and easily understandable for our clients. If you have specific follow-up questions or need further details, feel free to reach out. We’re here to help. Thank you for sharing your positive experience with this CFD simulation.

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