TwinMesh BlogTopics on Reliable CFD Simulation of Rotary PD Machines
The new release of TwinMesh 2024 is available and allows the CFD simulation of more complex applications.
While development and simulation of screw compressors for heavy gases as air or refrigerants are quite usual, those for light gases, here especially hydrogen as future carrier of green energy, make high demands on internal clearance sizes, rotor profiles, and operating conditions to ensure high efficiency.
The TwinMesh™ user group grows and grows and grows! We are thrilled to follow and support our customers on their way to improve and optimize their machines reaching the next level in design and performance.
This animation shows a conical rotary compressor with non-parallel variable pitch rotors that compresses air from 1 bar to 5 bar.
The new release of TwinMesh, version 2024 coming in October 2023, allows the CFD simulation of more complex applications.
CFD simulation of positive displacement machines considering the bending line due to pressure forces
In this CFD simulation, a double flow / two-sided SRM screw compressor has been setup with air at inlet pressure 1 bar, outlet pressure 6 bar and rotational speed of 12,333 rpm.
In an internally geared positive displacement machine, an externally lobed inner rotor rotates inside an internally lobed outer rotor. The outer rotor has one lobe more than the inner one, the rotation axes are displaced.
Increasing the efficiency of twin-screw machines is beneficial for gas compression and expansion applications. A research team from Taiwan used a computation fluid dynamic approach to obtain the flow field and efficiency of a twin-screw machine that used R-134a as the working fluid.
kontruktionspraxis published an article about TwinMesh™ 2023. konstruktionspraxis is the leading trade journal for developers and designers in mechanical, apparatus and vehicle engineering, electrical engineering and other metal and plastics processing industries.
We are pleased to announce the new release of TwinMesh™ 2023. We added many new features like adding deformation to the rotors and the casing. This gives you an even more realistic flow behaviour inside the machine. Read further for getting information about enhancements and new features in TwinMesh™ 2023.
We participated in this year’s International Conference on Screw Machines and had a really good time. From September 7th to 8th experts from academic research and industry gathered in Dortmund to present and discuss the latest developments in screw compressor technologies.
TwinMesh™ 2023 automatically generates high quality structured meshes of the rotating parts of PD machines and eliminates common numerical limits.
In this example you can see pressure distribution as contour plot on the rotor surfaces and on a cut plane on the left hand side; additionally, velocity at inlets and near the outlet is shown by streamlines in purple with a length of 2.5 ms.
We are pleased to announce the release of TwinMesh™ 2022. This brand new release of TwinMesh™ includes many new features that further improve the quality of meshes for complex geometries. Read further for getting information about enhancements and new features in TwinMesh™ 2022.
The success of the revolutionary meshing solution TwinMesh™ continues and grows more and more! TwinMesh customers in industry and science show their exiting papers, success stories and validation projects. A lot of things happened during the last couple of months and it is a great success.
Next free TwinMesh webinar, March 30, 2022 at 2pm (CEST): find out more about how TwinMesh and Ansys CFD 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!
We are pleased to announce that TwinMesh by CFX Berlin will be exhibitor at NAFEMS World Congress 2021 from October 25-29 in Salzburg, Austria. The NAFEMS World Congress covers every aspect of CFD, FEA and multiphysics engineering analysis and simulation.
This video by CFX Berlin is a webinar recording from 10th June 2021 and it demonstrates how to perfom reliable CFD analysis of rotating positive displacement machines using TwinMesh™ and Ansys CFD.
In this webinar on September 29th 2020 you can learn about the state of the art in terms of engineering simulation tools, together with the best practices and methodologies used by market-leaders for the design and development of: compressors, centrifugal pumps (centrifugal, axial, single / multi impeller, etc.), and volumetric machines (pistons, lobes, gears, etc.).