Increase your mastery of CONVERGE with free training at the user conference! Choose from a wide selection of introductory and advanced courses—some of which are rarely offered outside of the CONVERGE User Conferences. These training courses provide a great opportunity to learn directly from our Applications team engineers, each of whom has years of CFD experience and specialized expertise in CONVERGE. Space for our training courses is limited, so register today!

Thursday, March 14

In this workshop we will discuss timely and popular topics in internal combustion (IC) engine modeling and some of the unique features of CONVERGE that yield efficient and accurate simulations. Ever wonder why predicted cylinder quantities do not match the measured data when you think you have set up the case correctly? We will talk about what you need to consider when the predicted cylinder pressures do not agree with measurements and how to assess the accuracy of your input parameters. With optimized cell counts via Adaptive Mesh Refinement and fast flow and detailed chemistry solvers, you can extend your simulation domain to include multiple cylinders to analyze cylinder-to-cylinder variation, run multiple cycles to understand cycle-to-cycle variation, and capture propagating pressure waves to resolve engine knock. We will discuss published cases and how to set up similar cases in CONVERGE.
*This lecture includes hands-on CONVERGE Studio practice.

CONVERGE 3.0 is coming soon! The input files in CONVERGE 3.0 will take advantage of the YAML data serialization standard, which is highly readable and flexible. The output files in CONVERGE 3.0 will leverage the HDF5 hierarchical data format for ease of viewing and manipulation. In this lecture we will discuss what you need to know about the new input and output files, and we will show some scripting options that can expedite your CONVERGE 3.0 workflow. This lecture is intended primarily for CONVERGE users who work directly with input files rather than with the Case Setup module in CONVERGE Studio.

Rigid body fluid-structure interaction (FSI) modeling describes how the presence of one or more immersed objects affect the flow field and how the forces from the surrounding fluid influence the dynamics of the object. In this workshop we will discuss the theory behind FSI, the numerics of the dynamics solver, and the coupling of the dynamics solver to the flow solver in CONVERGE. We will consider several examples (a pressure relief valve, a spool valve, and an injector armature) that highlight the current capabilities of FSI modeling in CONVERGE. Finally, we will discuss complex examples that invoke a user-defined function coupled with FSI to model deforming bodies such as reed valve petals or a spring-close ball valve.
*This lecture does not include hands-on CONVERGE Studio practice.

This one-day course offers an introduction to setting up general flow cases in CONVERGE. CONVERGE is a multi-purpose CFD software that can be used for a wide variety of applications. Do you want to learn how to set up CONVERGE simulations but don’t see a training course specifically for your application area? If so, this general flow course is the one for you!  Because CONVERGE has a fully automated meshing process, you do not need to spend any time preparing the volume mesh, which simplifies the surface preparation process.

During this course, you will have plenty of time for hands-on practice in CONVERGE Studio. You will start by working on simple geometries, and move to geometries that are more complex.

Upon the completion of this course, you will know how to:

  • Begin a new project in CONVERGE Studio
  • Import a surface geometry from a CAD program
  • Coarsen the surface triangulation to reduce the computational cost
  • Create boundaries
  • Manually repair surface defects
  • Prepare moving boundaries for motion
  • Set up solver parameters and data files
  • Set up appropriate boundary and initial conditions
  • Set up wall heat transfer modeling and output heat transfer quantities for thermal analysis
  • Set up additional modeling options such as turbulence
  • Control grid settings throughout the computational domain
  • Run CONVERGE and monitor your simulation
  • Post-process results in CONVERGE Studio

Prerequisites

None

Who Should Attend This Course

This course is intended for new users to CONVERGE and CONVERGE Studio. This course can also be used as a refresher for experienced or occasional users of previous versions of CONVERGE and CONVERGE Studio.

CONVERGE includes a full spectrum of methodologies, from RANS to LES, to model turbulence. In this workshop, we will discuss the theory behind different methodologies and different turbulence models, as well as recommendations for and limitations of each model. In addition, we will discuss the results of some published RANS and LES simulations.
*This lecture does not include hands-on CONVERGE Studio practice.

This workshop will focus on model optimization in CONVERGE, including Genetic Algorithm (GA) optimization and Design of Experiments model interrogation. We will discuss different types of optimization and the details of the GA methodology, and we will use examples to illustrate how to set up the utility, select parameters, and run an optimization. Finally, we will discuss the best practices of optimization (e.g., model setup, parameter and range selection, and search space considerations) and advanced applications such as geometry modification.
*This lecture does not include hands-on CONVERGE Studio practice.

CONVERGE includes a variety of tools to complement the SAGE detailed chemistry solver. In this workshop we will discuss the zero-dimensional ignition delay, mechanism reduction, one-dimensional laminar flame speed, and mechanism merge tools.
*This lecture includes hands-on CONVERGE Studio practice.

CONVERGE includes state-of-the-art models for simulating liquid spray phenomena. In this workshop, we will describe the models in CONVERGE for liquid breakup, collision and coalescence, vaporization, drag, turbulent dispersion, and drop/wall interaction. In particular, we will discuss numerical mesh and parcel number settings for achieving grid convergence for RANS and LES simulations. This workshop will also describe CONVERGE’s VOF-spray one-way coupling option, in which CONVERGE collects detailed fluid flow information near the nozzle exit during a VOF simulation of the injector flow and then uses this information to inject parcels for Lagrangian spray calculations. Finally, in this workshop we will discuss the future of spray modeling in CONVERGE.
*This lecture does not include hands-on CONVERGE Studio practice.

CONVERGE Studio contains powerful tools for cleaning even geometries with significant problems. In this workshop we will discuss the advantages and limitations of several of these new features. The Coarsen tool can be used to reduce the number of triangles in a geometry, which may be useful when working with a large geometry. The Boolean tool can perform Boolean operations such as union, intersection, or difference. The Surface Healing tool, which was requested by many clients, can fix a variety of geometry problems at the click of a button. Finally, the Surface Wrapper tool can create watertight models by wrapping the existing geometry to create a new surface.
*This lecture includes hands-on CONVERGE Studio practice.

In this workshop we will explore the vast array of user-defined functions (UDFs) that can be used to adjust existing models, implement new models, direct CONVERGE to calculate additional quantities, or initialize or reinitialize physical variables. We will discuss the different types of UDFs that CONVERGE supports as well as the process of compiling the UDFs and the necessary header files.
*This lecture does not include hands-on CONVERGE Studio practice.

CONVERGE contains two detailed soot models – particulate mimic (PM) and particulate size mimic (PSM). Although it is computationally expensive to run a three-dimensional simulation with a detailed soot model and the SAGE detailed chemistry solver, CONVERGE contains acceleration strategies to make it feasible to include detailed soot modeling in engine simulations. In this workshop we will discuss the methodologies of these models, acceleration strategies for detailed soot modeling coupled with gas-phase chemistry, and the effects of important soot parameters. We will also discuss other emissions models (e.g., NOx) and give recommendations for these models.
*This lecture does not include hands-on CONVERGE Studio practice.

Learning a new CFD software takes time, even for quick learners. Moreover, as the modern engine design and analysis cycle continues to shrink, it is becoming even more challenging to take the time needed to get comfortable with a new CFD software. Let us help you quickly get up to speed with CONVERGE!

This single-day session is your chance to work one-on-one with a Convergent Science support engineer to set up a case of your choosing.

During the registration progress, you will be asked to complete a form that asks for some information about your case and why working with a Convergent Science engineer will be beneficial. Space is limited and completing the form does not guarantee entry into this training session. Those selected for this training session will receive a confirmation email approximately one week before the session.

If your case contains confidential information, we can make arrangements for you and the Convergent Science engineer to work in a private room.

Friday, March 15

For several years CONVERGE has been able to interface with other software packages to model heat transfer in solids. Now CONVERGE can do both CFD and solid heat transfer modeling in the same simulation, which can simplify the process of predicting the temperatures in solids that are dependent on fluid interfaces, e.g., heads and valves in engines. This workshop will discuss conjugate heat transfer modeling in CONVERGE, including supercycling, which accounts for the disparate timescales in the solid and fluid domains by allowing the solid side of the simulation to progress with faster timescales than the fluid side of the simulation, and valve/seat contact resistance in engines, which is critical to accurate prediction of valve and head temperatures.
*This lecture includes hands-on CONVERGE Studio practice.

This workshop will focus on Urea/SCR engine aftertreatment modeling in CONVERGE. We will discuss urea decomposition and hydrolysis to ammonia, and we will describe how to set up urea-water spray modeling in CONVERGE. In addition, we will review wall film and wall interaction models, phenomena (filming, rebounding, stripping, and separating) that can lead to urea deposit formation, and the application of conjugate heat transfer modeling to obtain accurate wall thermal boundary conditions. We will discuss SCR surface chemistry approaches that use CONVERGE coupled with GT-SUITE. This workshop will include sample cases for practical Urea/SCR systems as well as validation cases. Finally, we will discuss future plans for improved engine aftertreatment modeling.
*This lecture includes hands-on CONVERGE Studio practice.

CONVERGE contains several options for three-dimensional combustion modeling in combustion devices such as internal combustion engines, gas turbine combustors, and industrial burners. In this workshop, we will discuss several combustion models that can be used to simulate diffusion-controlled, non-premixed combustion: direct chemistry approach (SAGE), Representative Interactive Flamelet (RIF), 3-Zone Extended Coherent Flame Model (ECFM3Z), and Flamelet Generated Manifold (FGM). This workshop will focus on the underlying theory and the advantages and disadvantages of each combustion model, as well as how these models are coupled with the CFD solver in CONVERGE. We will give recommendations and best practices, and we will show published CONVERGE results for non-premixed combustion modeling in different types of engines.
*This lecture does not include hands-on CONVERGE Studio practice.

This course offers an introduction to CONVERGE for modeling flows in compressors and pumps. Although compressors and pumps can differ greatly from one another in terms of geometry and motion types, all compressor and pump simulations benefit from CONVERGE’s autonomous meshing capabilities. You will see how many of the same concepts can be applied to a variety of geometries and motions typical of compressors and pumps. The majority of the course will focus on positive-displacement devices such as reciprocating, gear, scroll, or vane compressors and pumps. A smaller section will be devoted to dynamic machines such as centrifugal and axial compressors and pumps. For hands-on practice and demonstrations, the course will reference example cases drawn from the following list:

  • R-134a reciprocating compressor
  • Large bore gas processing compressor
  • Roots blower
  • Dry claw vacuum pump
  • Dry air screw compressor
  • Oil flooded screw compressor
  • Supercritical CO2 scroll compressor
  • Rotary vane compressor
  • Diesel fuel piston pump
  • Gerotor oil pump
  • Pendulum-slider oil pump
  • Axial compressor periodic sector
  • Turbocharger centrifugal compressor
  • Centrifugal coolant pump

After this course is completed, you will be able to:

  • Define appropriate fluid properties for gases and liquids
  • Set up boundary motion prescriptions for
    • reciprocating pistons
    • counter-rotating screws and gears
    • orbiting scrolls
    • sliding vanes
  • Set up fluid-structure interaction models for pressure-relief valves, plate valves, and reed valves
  • Address leakage flows through gap sealing, gap flow resolution, and gap flow modeling
  • Incorporate multiphase effects into the models, including:
    • Oil flooding and gas condensation in compressors
    • Compressibility, aeration, and cavitation effects in pumps
  • Determine grid controls and time controls for resolving valve opening events and pressure fluctuations
  • Set up initialization strategies for efficiently reaching statistically stationary states
  • Apply the multiple reference frame (MRF) approach to rotating components

*This lecture includes hands-on CONVERGE Studio practice.

Who Should Attend:

This course is intended for anyone interested in using CONVERGE for modeling flows in compressors and pumps. It is helpful but not necessary to have previous experience using CONVERGE.

Suggested Follow-Up Courses:

Fluid-Structure Interaction Modeling, Volume of Fluid Modeling, Sealing, Conjugate Heat Transfer Modeling, Advanced Surface Preparation Tools in CONVERGE Studio

CONVERGE contains several options for three-dimensional combustion modeling in combustion devices such as internal combustion engines, gas turbine combustors, and industrial burners. In this workshop, we will discuss several combustion models that can be used to simulate premixed combustion: direct chemistry approach (SAGE), G-Equation, Extended Coherent Flame Model (ECFM), and Flamelet Generated Manifold (FGM). This workshop will focus on the underlying theory and the advantages and disadvantages of each combustion model, as well as how these models are coupled with the CFD solver in CONVERGE. We will give recommendations and best practices, and we will show published CONVERGE results for premixed combustion modeling in different types of engines.
*This lecture does not include hands-on CONVERGE Studio practice.

Learning a new CFD software takes time, even for quick learners. Moreover, as the modern engine design and analysis cycle continues to shrink, it is becoming even more challenging to take the time needed to get comfortable with a new CFD software. Let us help you quickly get up to speed with CONVERGE!

This single-day session is your chance to work one-on-one with a Convergent Science support engineer to set up a case of your choosing.

During the registration progress, you will be asked to complete a form that asks for some information about your case and why working with a Convergent Science engineer will be beneficial. Space is limited and completing the form does not guarantee entry into this training session. Those selected for this training session will receive a confirmation email approximately one week before the session.

If your case contains confidential information, we can make arrangements for you and the Convergent Science engineer to work in a private room.

In this workshop we will discuss mapping CONVERGE CFD results to different surface files for uncoupled heat transfer analysis in third party software. We will discuss the CONVERGE htc_map utility, including the methodology of cycle averaging, details of the mapping method, how the geometry is aligned for surfaces, and best practices for mapping. We will review an example of a heat transfer analysis and explain how to bring the spatial temperature boundary condition prediction back to CONVERGE. Additionally, we will briefly discuss the best practices for heat transfer prediction in CONVERGE CFD simulations.
*This lecture does not include hands-on CONVERGE Studio practice.

This one-day course builds on the topics covered in the General Flow Modeling in CONVERGE course and will focus on applying CONVERGE to gas turbine combustion and combustor analysis.

During this course, you will have plenty of time for hands-on practice in CONVERGE Studio. You will start by working on simple gas turbine geometries, and move to geometries that are more complex.

Upon the completion of this course, you will know how to:

  • Import a surface geometry from a CAD program or create a gas turbine combustor geometry from scratch
  • Repair surface defects in gas turbine combustor geometries
  • Set up liquid and gaseous fuels for gas turbine simulations
  • Set up the SAGE detailed chemistry solver, Thickened Flame model, and Flamelet Generated Manifold model
  • Generate wall temperature predictions via conjugate heat transfer modeling
  • Set up transient RANS and LES simulations and steady-state simulations for both reacting and non-reacting cases
  • Understand combustor flow splits, gas turbine ignition at high altitude, lean blow-off, extinction, and flashback
  • Analyze emissions data for NOx, CO, and soot

Prerequisites

General Flow Modeling in CONVERGE

Who Should Attend This Course

This course is intended for those who are new to modeling gas flow or continuous flow combustion in CONVERGE and CONVERGE Studio. This course can also be used as a refresher for experienced or occasional users of previous versions of CONVERGE and CONVERGE Studio.

Volume of fluid (VOF) methods are some of the most popular numerical techniques for locating moving and deforming interfaces between fluids in multiphase flow simulations. In this workshop we will discuss numerical details, example cases, and some validation calculations for the various VOF options in CONVERGE. One VOF method in CONVERGE is based on the species mass fraction equation and is appropriate for miscible or compressible multiphase flow calculations. One option in CONVERGE, which is based on the mass fraction VOF, is VOF-spray one-way coupling. In this option CONVERGE collects detailed fluid flow information near the nozzle exit during a VOF simulation and then uses this information to inject parcels for Lagrangian spray calculations. Another VOF method, which solves for the void fraction directly, is available in CONVERGE as two separate schemes: Piecewise-Linear Interface Calculation (PLIC) and High-Resolution Interface-Capturing (HRIC). These schemes have been tested on a range of problems including a breaking dam, a rising droplet, and spray injection, and each test case illustrates the ability of the method to track interfaces sharply.
*This lecture includes hands-on CONVERGE Studio practice.

CONVERGE Studio is not just for pre-processing! There are several powerful post-processing tools in the Line Plotting module in CONVERGE Studio. This workshop will discuss (1) how to generate and customize plots and create reports, (2) how to combine output files from multiple restarts, (3) how to use the Fast Fourier Transform calculator to transform the signal between the time and frequency domains and to complete engine knock analysis, (4) how to use the Apparent Heat Release Rate calculator to calculate the apparent heat release from a pressure signal, and (5) how to use the Engine Performance calculator to calculate the work and indicated mean effective pressure (IMEP) from cylinder pressure.
*This lecture includes hands-on CONVERGE Studio practice.

CONVERGE and GT-SUITE can be coupled in a variety of ways. This workshop will discuss two coupling options. In conventional 1D-3D coupling, CONVERGE performs a 3D simulation while GT-SUITE performs a 1D simulation. The information at the interfaces is exchanged or mapped between the two programs. In hydromechanical coupling, you define a system with rigid bodies in GT-SUITE and subject the rigid bodies to fluid forces and constraints using CONVERGE. CONVERGE calculates the forces on the object and relays this information to GT-SUITE. GT-SUITE then solves the rigid body dynamics equations to update the object’s state and sends this information back to CONVERGE. Finally, CONVERGE moves the object.
*This lecture does not include hands-on CONVERGE Studio practice.

CONVERGE contains a sealing tool, which will close gaps between parts that are moving relative to one another. The sealing process is dynamic in that the surface enclosing the computational domain is recreated at each time-step based on the boundary motion and the seal definitions, and thus this tool can be applied to a variety of cases, including two-stroke engines, Wankel engines, components connected by pins and bearings, pumps, and rotating machinery. We will give an overview of the sealing algorithm and explain the geometric approach used to recreate the sealed surface from the boundaries and seal definitions. We will discuss best practices for surface preparation and case setup, and we will demonstrate examples of applying seals to a check valve, a two-stroke engine, a Wankel engine, crankcase components, a gerotor pump, and a supercharger.
*This lecture does not include hands-on CONVERGE Studio practice.