It’s always nice to see what our customers do with TwinMesh. Here are some recent publications.
A CFD-Based Comparison of Different Positive Displacement Pumps for Application in Future Automatic Transmission Systems
The efficiency requirements for hydraulic pumps applied in automatic transmissions in future generations of automobiles will increase continuously. In addition, the pumps must be able to cope with multiphase flows to a certain extent. Given this background, a balanced vane pump (BVP), an internal gear pump (IGP) and a three-dimensional geared tumbling multi chamber (TMC) pump are analyzed and compared by a computational fluid dynamics (CFD) approach with ANSYS CFX and TwinMesh.
Analysis of the Inner Fluid-Dynamics of Scroll Compressors and Comparison between CFD Numerical and Modelling Approaches
Scroll compressors are widely adopted machines in both refrigeration systems and heat pumps. However, their efficiency is basically poor and constitutes the main bottleneck for improving the overall system performance. In fact, due to the complex machine fluid dynamics, scroll design is mainly based on theoretical and/or semi-empirical approaches. Designs strategies that do not guarantee an in-depth analysis of the machine behavior can be supplemented with a Computation Fluid Dynamics (CFD) approach. To this purpose, in the present work, the scroll compressor inner fluid dynamics is numerically analyzed in detail using two CFD software and two different modelling strategies for the axial gap. The strategy based on modelling the axial gap with the TwinMesh/CFX approach is closer to the real operating conditions since it allows to consider the radial leakage through pockets.
Development of CFD-based procedure for 3D gear pump analysis
Tumbling Multi-Chamber (TMC) gear pump is a generally unknown type of hydraulic device, which features a unique three-dimensional shape of the gears. The main benefits of such design over the conventional gear pumps are self-adapting tightness of the pump parts, the possibility to mold the parts from a polymer material and high volumetric efficiency. Goal is the development of an analysis procedure, which allows studying flow and pressure conditions in the TMC pump. This includes the influence of the positioning of the pump parts on spatial and temporal variations in sealing regions and the influence of pressure field propagation in relation to the valve plate position.
Leakage loss estimation and parametric study on the effect of twist in rotor shape for harnessing Pico hydropower
Renewable energy will play an important role in achieving the energy stability and reducing the dependence on fossil fuels. Hydropower is one of the cheapest and reliable sources of renewable energy. The potential of micro and Pico hydro power is not yet fully explored. The present work illustrates the Pico hydro power generation potential of a new class of hydraulic turbine known as positive displacement turbine (PDT).
CFD Simulation and Experimental Study of Working Process of Screw Refrigeration Compressor
Twin-screw refrigeration compressors have been widely used in many industry applications like central air conditioning systems for commercial buildings and residential buildings. The study of the thermodynamic performance of twin-screw refrigeration compressors is helpful in optimizing the performance of the compressor and finding out the optimum operating condition of the compressor unit. In this paper, a three-dimensional model was established based on the experimental twin-screw refrigeration compressor. The internal flow field of the twin-screw compressor was simulated by computational fluid dynamics (CFD) software using the structured dynamic grid technology TwinMesh™ by CFX Berlin.