TwinMesh
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TwinMesh is a [[Meshing|meshing]] software developed by CFX Berlin Software GmbH, Germany. It automatically generates hexahedral meshes for the [[Introduction to CFD|CFD]] simulation of the continuously changing fluid volumes of the working chambers of rotary positive displacement machines. The product was released in 2014. | TwinMesh is a [[Meshing|meshing]] software developed by CFX Berlin Software GmbH, Germany. It automatically generates hexahedral meshes for the [[Introduction to CFD|CFD]] simulation of the continuously changing fluid volumes of the working chambers of rotary positive displacement machines. The product was released in 2014. | ||
| - | The current product release is Version 2017 | + | The current product release is Version 2017, released in November 2017. |
=== Mesh Types === | === Mesh Types === | ||
| - | TwinMesh can generate [[Structured mesh generation|structured]] hexahedral meshes.<br/> | + | TwinMesh can generate [[Structured mesh generation|structured]] hexahedral meshes for the axial gaps and working chambers of rotary positive displacement machines.<br/> |
| - | TwinMesh can generate [[Unstructured mesh generation|unstructured]] tetrahedral meshes for the axial gaps of rotary positive displacement machines. | + | Additionally, TwinMesh can generate [[Unstructured mesh generation|unstructured]] tetrahedral meshes for the axial gaps of rotary positive displacement machines. |
=== Meshing Techniques === | === Meshing Techniques === | ||
| Line 39: | Line 39: | ||
* Internal/external gear pump | * Internal/external gear pump | ||
* Gerotor pump | * Gerotor pump | ||
| + | * Orbital motor | ||
* Vane pump | * Vane pump | ||
| - | * Lobe pump | + | * Lobe pump |
| + | * Roots blower | ||
* Rotary piston pump | * Rotary piston pump | ||
* Scroll compressor/expander | * Scroll compressor/expander | ||
| + | * Conical rotor pump | ||
* Screw compressor/expander | * Screw compressor/expander | ||
* Eccentric screw pump/progressive cavity pump | * Eccentric screw pump/progressive cavity pump | ||
| Line 49: | Line 52: | ||
=== CFD Solver Interfaces === | === CFD Solver Interfaces === | ||
| - | TwinMesh has built-in support for [[Ansys FAQ|ANSYS]] CFX. | + | TwinMesh has built-in support for [[Ansys FAQ|ANSYS]] CFX and automatically generates ready-to-run templates for ANSYS CFX. |
=== Supported Platforms === | === Supported Platforms === | ||
Revision as of 08:38, 10 November 2017
Contents |
TwinMesh
TwinMesh is a meshing software developed by CFX Berlin Software GmbH, Germany. It automatically generates hexahedral meshes for the CFD simulation of the continuously changing fluid volumes of the working chambers of rotary positive displacement machines. The product was released in 2014.
The current product release is Version 2017, released in November 2017.
Mesh Types
TwinMesh can generate structured hexahedral meshes for the axial gaps and working chambers of rotary positive displacement machines.
Additionally, TwinMesh can generate unstructured tetrahedral meshes for the axial gaps of rotary positive displacement machines.
Meshing Techniques
TwinMesh's mesh generation employs the following meshing techniques and smoothing algorithms.
- Option to fix the nodes along the rotors, which results in a general interface between the rotor meshes.
- Option to fix the nodes along the housing geometry to get an 1:1 interface between the rotor meshes.
- Option to fix the nodes on one of the rotors so that the nodes on the other rotor are able to move. This method also results in an 1:1 rotor interface.
- Option to mesh rotors with variable pitch.
- Manual adjustment of individual nodes.
- Node mapping at general grid interfaces.
- Various smoothing algorithms to control mesh orthogonality and node equidistance in all three dimensions.
- Mesh quality check such as: determinant, min. angle, volume change, aspect ratio.
Geometry Support
TwinMesh supports IGES (.iges) and point data (.csv).
The following geometry modifications are available in TwinMesh:
- Rotor scaling
- Rotor translation
- Rotation angle offset
Rotary Positive Displacement Machines
TwinMesh allows meshing of the following rotary positive displacement machines:
- Internal/external gear pump
- Gerotor pump
- Orbital motor
- Vane pump
- Lobe pump
- Roots blower
- Rotary piston pump
- Scroll compressor/expander
- Conical rotor pump
- Screw compressor/expander
- Eccentric screw pump/progressive cavity pump
- Wankel engine
CFD Solver Interfaces
TwinMesh has built-in support for ANSYS CFX and automatically generates ready-to-run templates for ANSYS CFX.
Supported Platforms
TwinMesh supports 64-bit Windows versions.
Literature
- Hesse, J., Spille-Kohoff, A., Hauser, J., & Schulze-Beckinghausen, P. (2014). Structured meshes and reliable CFD simulations: TwinMesh for positive displacement machines. In International screw compressor conference, TU Dortmund.
- Spille-Kohoff, A., Hesse, J., & El Shorbagy, A. (2015, August). CFD simulation of a screw compressor including leakage flows and rotor heating. In IOP Conference Series: Materials Science and Engineering (Vol. 90, No. 1, p. 012009). IOP Publishing. ([1])
- Andres, R., Nikolov, A., & Brümmer, A. (2016). CFD Simulation of a Twin Screw Expander including Leakage Flows. In 23rd International Compressor Engineering Conference at Purdue, July 11-14, 2016. ([2])
- Willie, J. (2017, September). Use of CFD to predict trapped gas excitation as source of vibration and noise in screw compressors. In IOP Conference Series: Materials Science and Engineering (Vol. 232, p. 012021). IOP Publishing. ([3])
External Links
* TwinMesh Homepage * CFX Berlin Homepage
