In the computational fluid dynamic analysis, engineers are using a fixed rotation set-up for the moving mesh that includes the design of the turbine. However, if one is interested in a flow-induced rotation, the six degrees of freedom library in OpenFOAM can be used to handle such analysis. Discount of 25% possible.
The descritization of the continous fluid is the essential task in the field of computational fluid dynamics and numerical analysis. Due to the stiff learning curve of OpenFOAM, especially at the beginning, even simple geometry meshing procedures are hard to achieve. Therefore, the following training case provides information for the first steps with snappyHexMesh.
Arbitrary Rotating Inlet ACMI
The arbitrary coupled mesh interface (ACMI) condition is compelling if the usage of the boundary condition is well understood. The following training case builts an ACMI for a rotating inlet pipe which is connected to a larger second pipe. The set-up is tricky and needs advanced techniques and applications for the correct ACMI generation. Discount of 25 % possible.
The Surface Feature Refinement (SFR)
SnappyHexMesh can refine defined feature edges during the refinement stage. However, many people in the community have a lot of problems with the feature edge refinement strategy. Therefore, Holzmann CFD provides the SFR case which meshes a pipe with three different surface feature refinement set-up's. The results, especially the wrong ones, might be familiar.
Meshing a Pipe
People all over the world who start in the field of numerical simulation commonly start with a simple fluid dynamic analysis in a pipe. However, for new OpenFOAM users, even the trivial pipe meshing can be challenging. Therefore, Holzmann CFD provides two cases in which a pipe bending under 45 degree and 90 degrees will be discretized. Additionally, the layer generation is applied while a coverage of 99.5 percent is reached.
Meshing a Helix
The in-house mesher of OpenFOAM® named snappyHexMesh is infamous in the community due to meshing problems in more advanced and complex geometries. This might be true if you are not using snappyHexMesh correctly. This training case shows the basic meshing settings for the helix geometry. Additionally, a way of the layer generation is shown which will end up with a coverage above 95 percent.
Generation of an 2D arbitrary mesh interface (AMI)
Holzmann CFD offers a wide range of different tutorials. Especially focused on dynamic meshes and special features. This training case provides all information that are required to generate a 2D arbitrary mesh interface (AMI) in OpenFOAM. As always, the case uses the well-known and clean bash scripts. Discount of 25 % possible.
Creation of an Arbitrary Mesh Interface (AMI)
The generation of the arbitrary mesh interface (AMI) boundary condition is used for splitting the static and dynamic mesh regions. To create such boundaries, different methods can be applied. Commonly, Holzmann CFD uses the inhouse mesher of OpenFOAM namely snappyHexMesh, to generate high valuable numerical meshes. Discount of 25% possible.
Arbitrary Coupled Mesh Interface
In engineering applications, it is common to have active parts which connect and disconnect. Using the arbitrary coupled mesh interface in OpenFOAM® allows one to use dynamic elements that connect and disconnect during the time. The usage of such boundary conditions and the correct set-up is the principal focus of this training case. Discount of 25 % possible.
Arbitrary Rotating AMI
Dynamic meshes are state of the art for engineering processes. In many cases, the numerical analysis has to be adapted to the rotation because, e.g., the multi-reference-frame (MRF) assumption does not hold anymore. To investigate into such phenomenon, OpenFOAM offers a mapping and interpolation boundary condition namely arbitrary mesh interface (AMI). Discount of 25 % possible.
Cell Zone Generation within SnappyHexMesh
Particular regions in a mesh could require unique properties such as the modeling of porosities or source terms. Therefore, cellZones has to be used in OpenFOAM®. SnappyHexMesh can be one way to define such zones during the meshing stage directly. Based on the snappyHexMeshDict set-up, different quality levels can be achieved. Especially the influence of the »featureEdge« feature is demonstrated in the training case.
2D Rotational Axis Symmetric Meshing
2D and 2D rotational axis symmetric numerical meshes are used whenever it is possible. This method is related to the savings in computational effort and simplification at all. However, there are several ways to create 2D rotational axis symmetric geometries in OpenFOAM®. For more complex designs, it is worth to analyze the following training case which uses the 3D meshing tool »snappyHexMesh« to mesh the geometry in 3D first, and afterward derive the 2D rotational axis symmetric model by using other OpenFOAM® tools such as extrudeMesh and so on.
Polluted air is a problem of many countries especially in big cities or at landscapes in which the air exchange is small related to the geographical location. Thus, governments make laws such as TA-Luft, BImSchV in Germany or stringent global regulation (world bank). To reduce the pollution of engines or any operating system consuming fossil fuels numerical analysis methods can be used to perform optimization to the existing systems to run more efficient and effective and therefore economically better. Discount of 25 % possible.
Geometric Variation Optimization | OpenFOAM® and DAKOTA®
Optimization tasks are the state of the art to optimize the design for the operating point. To prevent different modeling scenarios manually, the free software tool DAKOTA® can be used to automize the optimization task. This training case shows the coupling of both software tools, DAKOTA®, and OpenFOAM®. Discount of 25 % possible.
Free Convection in a Solar Chimney
In a wide range of engineering applications, the buoyancy force is the main driving force for the fluid flow. However, in the case of numerical investigations, engineers do have problems in setting up such cases or run into troubles/crashes with OpenFOAM®. This training case shows the set-up and geometry preparation of a more complex application. Discount of 25 % possible.
Gin Tonic (Conjugated Heat Transfer)
Heat transfer problems, including several different regions, are state of the art simulations for CFD engineers. In each engineering application, heat transfer processes occur. Depending on the investigation, the energy transport can be one of the critical quantities such as thermal stress, temperature resistance and so on. The training case provides the correct set-up for such kind of problems and will guide the trainee through the different steps. Discount of 25 % possible.
Everybody is aware of a windscreen washer build in a car. However, most of the people think that there is a nozzle which is distributing the water onto the windscreen. This training case demonstrates the proper work of such a device. It is not a nozzle nor a mechanically driven spray generation. By using deliberate geometric designs, a fluid induced instability is generated which distributes the outcoming water stream periodically onto the object it is aimed. Discount of 25 % possible.
Vertical Axial Wind Turbine (VAWT)
Flow-induced rotations are state of the art problematics in computational fluid dynamics analysis such as wind turbines or Kaplan turbines. OpenFOAM® offers the possibility to use an existing library namely the Six Degree of Freedom (6DoF) library to model such a phenomenon. This training case will guide you through the necessary steps to simulate flow-induced rotations. The well known and structured Holzmann CFD's run script is generating the whole case automatically and therefore, you can understand and follow each step. Discount of 25 % possible.