Course detail

Advanced Methods in CFD

FSI-LPMAcad. year: 2025/2026

The course extends the basic skills in CFD simulations to tasks of an interdisciplinary nature, in particular the interaction of fluids and solids or liquids and gases. The course offers the application of dynamic meshes in the solution of the motion of rigid or deformable bodies in a fluid, the definition of the possibilities of fluid-structure interactions and the use of more general multiphase models in which different phases are represented by a more significant amount or volume fraction. The focus of the course is mainly practical, application-based and relies on the capabilities of simulation tools from ANSYS, Inc.

Language of instruction

Czech

Number of ECTS credits

3

Mode of study

Not applicable.

Guarantor

Ing. Roman Klas, Ph.D.

Department

Energy Institute (EÚ)

Entry knowledge

Not applicable.

Rules for evaluation and completion of the course

Completion of the course is in the form of a classified academic credit. The award of credit and its grade according to the ECTS grading scale is based on independent work on the assigned projects. The basis for the assessment of the projects are the technical reports.

Attendance at classes is compulsory and is recorded. Methods of making up missed classes are handled on an individual basis.

Aims

Not applicable.

Study aids

Prerequisites and corequisites

Not applicable.

Basic literature

ANSYS Design Modeler User's Guide. Dostupné z: http://www.ansys.com (EN)
ANSYS Fluent User's Guide. Dostupné z : http://www.ansys.com (EN)
ANSYS Fluent User's Guide.Dostupné z : http://www.ansys.com (EN)
ANSYS Mechanical User's Guide. Dostupné z : http://www.ansys.com (EN)
ANSYS Mesh User's Guide. Dostupné z : http://www.ansys.com (EN)
CENGEL, Y., CIMBALA, J: Fluid Mechanics Fundamentals and Applications, McGraw-Hill, ISBN 978-0-0-07-352926-4 (EN)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme N-SUE-P Master's 2 year of study, winter semester, compulsory

Type of course unit

 

Computer-assisted exercise

26 hod., compulsory

Teacher / Lecturer

Ing. Roman Klas, Ph.D.

Syllabus

  1. Introduction to transient CFD simulations using a dynamic computational mesh. Applicability of dynamic meshes to the solution of the motion of rigid bodies in a fluid, such as gates, pistons or valve poppets. Introduction to the properties of the simulated domain and dynamic meshes.
  2. Simulation using a dynamic computational mesh considering the forced motion of a two-dimensional rigid body with one degree of freedom in a fluid. The motion of the body is defined by known kinematic boundary conditions.
  3. Simulation using a dynamic computational mesh considering the self-excited motion of a two-dimensional rigid body with one and three degrees of freedom in a fluid. The motion of the body is induced by the force effects of the fluid. Possibilities for incorporating mechanical system parameters into the fluid system.
  4. Simulation using a dynamic computational mesh considering the forced motion of a three-dimensional rigid body with one degree of freedom in a fluid. Comparison of the results of 2D and 3D CFD simulations involving a dynamic computational mesh with one-dimensional mathematical models.
  5. Introduction to multiphase CFD simulations. Definition and description of basic approaches for multiphase flow simulation.
  6. Simulation of multiphase flow using Euler - Lagrange approach in the description of the continuum and dispersed phase including e.g. small particles, bubbles or droplets. Possibilities of exchanging momentum, mass and energy between discrete and liquid phases using a discrete phase model (DPM).
  7. Simulation of multiphase flow using Euler - Euler approach in the mathematical description of interpenetrating continuous phases. Using the VOF model to simulate immiscible fluids such as free-surface fluid flow, stratified flow, or the motion of large bubbles in a fluid.
  8. Simulation of multiphase flow using Euler - Euler approach in the mathematical description of interpenetrating continuous phases. Simplified Mixture model designed for two or more fluids or particle phases used to study homogeneous flow, sedimentation or cavitation. A complex Eulerian model also applicable, for example, to particle suspensions or chemical reactors.
  9. Introduction to FSI simulations combining fluid and structural solver affecting the interaction between fluid and deformable body. Differences between one-way and two-way FSI simulation.
  10. Preparation of a computational model of a two-way 3D FSI simulation including description of fluid, deformable body and solution domain properties and generation of computational meshes.
  11. Preparation of a computational model of a two-way 3D FSI simulation including the setup of the structural and fluid solver, their coupling and solution monitoring options.
  12. Implementation of the two-way 3D FSI simulation. Analysis of the results of the 3D FSI simulation with respect to the significant time consumption of the solution.
  13. Possibilities of realization of one-dimensional two-way FSI simulation. Comparison of one-dimensional and three-dimensional two-way FSI simulation approaches and results. Coupling one-dimensional mathematical models and CFD simulations into one computational model.