Fast – Reliable – Efficient

A revolutionary meshing solution for reliable CFD analysis of rotary positive displacement machines

TwinMesh automatically generates high quality hexahedral grids for the moving parts of rotary positive displacement machines.

TwinMesh is complementary to ANSYS CFD. It allows for reliable CFD analysis of pd machines using all physics available in this leading CFD software package.



TwinMesh provides an automated workflow for structured mesh generation and CFD analysis setup of rotary positive displacement machines.



TwinMesh delivers high resolution and high quality numerical grids, avoids interpolation errors and allows the usage of the full range of physics available in ANSYS CFD.



Structured grids made with TwinMesh allow for reasonable transient CFD model size while ensuring maximum numerical quality.

Discover Features of TwinMesh

TwinMesh is available for these PD Machines


High Quality Numerical Grids

And Less Gap Size is Possible


Of Rotary PD Machines Available


Reliable and Amazing Results

Works seamless with



Direct Export to ANSYS CFX

TwinMesh is fully optimized for CFD analysis using leading ANSYS CFD software. It exports mesh data in ANSYS CFX format and ready-to-run input files for ANSYS CFX.


Built on Years of ANSYS Expertise

TwinMesh is developed by CFD experts from CFX Berlin Software GmbH, a certified ANSYS Channel Partner from Germany for almost twenty years now.

Preview of Mesh Interpolation and Non-Reflective Boundary Conditions in TwinMesh 2018

The next preview of new features in TwinMesh 2018: we implemented a mesh interpolation method in User Fortran. So far, the time step size of the CFD simulation has to be set according to the desired revolution speed and the prescribed angle increment of the pre-generated meshes from TwinMesh. Now it is possible to set an arbitrary time step size, and the corresponding mesh is calculated with a spline interpolation between the pre-generated meshes at run-time.

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Preview of Non-Reflective Boundary Conditions in TwinMesh 2018

Preview on new features in TwinMesh 2018: we have implemented non-reflective boundary conditions (NRBC) in ANSYS CFX via User Fortran in a stable and robust way so that they can be used for positive displacement compressors instead of the standard openings which are reflective (RBC). While RBC lead to standing waves, especially at pressure side with mass flow strongly pulsating and even flow reversal, NRBC allow pressure fluctuations from pressure port to travel to the outlet and leave there without any artificial reflections so that mass flow is more uniform and realistic.

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TwinMesh Webinar

Next free TwinMesh webinar on 3rd of July 2018 at 3pm (CEST): find out more about how TwinMesh and ANSYS CFX allow for reliable 3D CFD analysis of rotary positive displacement machines such as screw compressors, lobe pumps, vane pumps, Wankel engines, gear pumps, progressive cavity pumps, or scroll expanders!

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Contact us for more information or book a free webinar