GridPro Xpress PDM

Automatically generates high-quality flow-aligned hexahedral grids for rotary positive displacement machines such as screw and scroll compressors, lobe, gerotor, vane and hook and claw pumps.

Why Choose GridPro Xpress PDM?

GridPro Xpress PDM is a specialized mesh automation solution designed for rotary positive displacement machines like screw, scroll, gerotor and lobe compressors. Its structured hexahedral meshing offers unparalleled accuracy in capturing intricate geometries and narrow leakage gaps, which are critical for precise CFD simulations. The software excels in resolving clearance gaps and leakage paths with dynamic boundary-conforming algorithms, enhancing prediction accuracy and reducing numerical errors.

Advanced mesh controls allow users to define mesh size, resolution, and local refinements, ensuring high-quality grids tailored to specific flow regions. Its automated workflow ensures consistent grid quality across all rotor positions, eliminating manual adjustments

With ready-to-run CFD exports and support for standard CAD formats, Xpress PDM seamlessly integrates with leading CFD solvers for high-fidelity analysis in PDM applications.

High Mesh Control and Quality
Accurate Capturing of Leakage Gaps
Optimum Cell Count with Local Refinement
Hexahedral meshing outweighs other element types
Hands-Free Automated Meshing
High Reliability in Meshing Solutions

High Mesh Control and Quality
Accurate Capturing of Leakage Gaps
Optimum Cell Count with Local Refinement
Hexahedral meshing outweighs other element types
Hands-Free Automated Meshing
High Reliability in Meshing Solutions

High Mesh Control and Quality

GridPro Xpress PDM ensures superior mesh control and quality for rotary positive displacement machines through its advanced features. Users can precisely define mesh size, resolution, and specific refinement zones, allowing for detailed representation of complex geometries. The software generates boundary layer grids, which are essential for accurately capturing the flow behavior near solid surfaces. Additiona...

Accurate Capturing of Leakage Gaps

GridPro Xpress PDM is designed to capture leakage gaps with high precision, essential for simulating positive displacement machines (PDMs) like screw compressors effectively. Leakage flows in these compressors, especially under conditions of low speed and high pressu...

Optimum Cell Count with Local Refinement

PDM Xpress optimizes mesh generation for PDMs like screw compressors by strategically applying local refinement to critical regions, such as interlobe gaps and blow-hole areas. By focusing increased cell density in these regions, PDM Xpress enhances the accuracy of capturing complex leakage flows while keeping the overall cell count manageable. This targeted refinement improves the representation of rotor curv...

Hexahedral meshing outweighs other element types

GridPro PDM Xpress leverages structured hexahedral meshing to provide superior accuracy and efficiency in discretizing PDMs fluid passages. Hexahedral cells offer distinct advantages over other element types, such as tetrahedral or polyhedral cells, by enabling higher grid quality and enhanced solution accuracy. The structured layout of hexahedral meshes ensures robust solver convergence and greater control ov...

Hands-Free Automated Meshing

PDM Xpress from GridPro streamlines the meshing process for positive displacement machines using a single-topology multi-configuration approach. A wireframe topology is first created for a specific instance of rotor/gear positioning, serving as a reusable template for all angular steps. Through an automated Python script, PDM Xpress rotates the inner and outer rotor/gear at user-defined angular increments, gen...

High Reliability in Meshing Solutions

GridPro Xpress PDM delivers a highly reliable meshing solution tailored for rotary positive displacement machines. It automatically generates high-resolution, structured 3D meshes, designed to capture complex geometries accurately and eliminate interpolation errors. This precision ensures that CFD solvers can leverage the complete range of physical models without limitations, resulting in more accurate and dep...

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GridPro Xpress PDM

Why Choose GridPro Xpress PDM?

High Mesh Control and Quality

Accurate Capturing of Leakage Gaps

Optimum Cell Count with Local Refinement

Hexahedral meshing outweighs other element types

Hands-Free Automated Meshing

High Reliability in Meshing Solutions

Related Blog articles

Automated Hexahedral Meshing of Gerotor Pumps

Automation of Hexahedral Meshing for Scroll Compressors

Accurate Capturing of Leakage Gaps in Screw Compressors with Hex Grids

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