Meshing for Control, Quality, and Automation
You can generate structured multi-block, unstructured, hybrid, and overset meshes for viscous simulations with precise control over point placement and clustering to get the resolution you need. At the same time, Pointwise’s core meshing methods produce cells of high quality to ensure convergence and accuracy in your CFD solution.
Using Pointwise’s Glyph scripting language, you can automate most or all of the mesh generation process by writing macros and templates. And the software’s plug-in SDK gives you the ability to write a mesh exporter customized to your CFD solver. Between Glyph and plug-ins, you can customize the entire meshing process from geometry model import to flow solver export.
Numerical Investigation of a Pick-and-Place Machine
Students at KTH Royal Institute of Technology in Sweden investigated the performance of a pick-and-place machine using CFD. Pointwise was used to perform a grid refinement study for a static simulation where the nozzle of the machine as well as the distance to the component varied. Additionally, an overset mesh was generated for a 1-DOF dynamic simulation.
Automating Geometry and Mesh Generation for Heat Exchangers
Maura Gallarotti, a master's student at KTH Royal Institute of Technology in Sweden, used Pointwise Glyph scripting to quickly generate families of candidate heat exchanger designs and to perform parametric studies by changing the dimensions of several geometrical parameters to assess the effect of these parameters on cooling efficiency. With no experience using Pointwise and having never heard about Tcl/Tk or Glyph she was able to write a script to completely automate the grid generation process in less than a week.
North America’s Largest 3-D Printed Structure Started as a Mesh
While the folks at Pointwise appreciate the beauty and utility of grids, usually the computational meshes produced by our software are used as an intermediate step in a customer’s engineering analysis process and not as the final goal of the project. However, Branch Technology, with its novel freeform 3-D printing techniques actually turns these meshes into physical structures that can be used as building elements or as seen here, works of art.
Meshing the 24th IMR Fender® Jazzmaster Guitar and the Abdominal Atlas
Last month several Pointwise engineers attended the 24th International Meshing Roundtable (IMR) held in Austin, Texas. We brought two grids generated for two benchmark geometries provided by the IMR steering committee. The grids were made by Carolyn Woeber, Travis Carrigan, and myself. We were pleased to hear that the grids were recognized both for their technical merit and striking visuals - they had won the Meshing Contest award.
Direct Numerical Simulation of Woodwind Aeroacoustics
Researchers at Toyohashi University of Technology in Japan have used detailed DNS calculations of the flow through a recorder to better understand its sound generation mechanisms and give guidance for future instrument designs.
Meshing's Path Forward
Pointwise president John Chawner recently participated in a panel discussion on the future of mesh generation at the AIAA Science and Technology Forum 2015. Here is his summary of the topics covered and a glimpse of the meshing challenges we face.
Mesh Topology Influence on Volute Aerodynamic Performance Computed Using Code Leo
In this webinar, we evaluate a generic volute design. Simulations were performed using Code Leo, a computational fluid dynamics (CFD) solver developed by AeroDynamic Solutions (ADS), on three different grid types generated with Pointwise: multi-block structured, unstructured with a hexahedral boundary layer, and unstructured with a prismatic boundary layer.
Structured Grid for an Aneurysm
As part of the CFD Challenge hosted by Dr. Gabor Janiga at the Otto von Guericke University Magdeburg, two aneurysm geometries were provided and participants were encouraged to use CFD tools to predict which of the two models had a higher probability of rupture. In this video, we will demonstrate how to create a multiblock structured volume mesh for one of the aneurysm geometries.
CFD Investigation of LBE Rod Bundle Flow
LBE is a eutectic mixture consisting of 45 percent lead and 55 percent bismuth. It is foreseen as a possible coolant for Generation IV nuclear reactor systems. The most interesting properties of LBE in comparison with lead and water are presented in Table 1.
CFD Analysis of Cavitation and Acoustics of a High Energy Water Injection Pump
Combustion Research and Flow Technology (CRAFT Tech) utilizes the best CAE tools available to help investigate and understand the complex cavitation phenomena occurring in high energy water injection pumps. The complex geometry and physics of the problem make it a challenge to predict the unsteady interactions between the various components of the pump and the potential for cavitation in the impeller..
Gas Turbine Combustor Mixing at Cranfield
Natural gas accounts for more than 23 percent of the world's energy production. Although it is not used in airplane engines because of its large storage volume, it has become widespread in industrial gas turbines and is the fuel of choice for many to plug the “energy gap” within the United Kingdom.
Mesh Manipulation for Moving Surfaces
Many aerospace-related applications exist that require surfaces to move within a given region. This can include bodies moving relative to each other, as happens during a store separation, or surfaces actually changing shape, which is what happens with ablation and aeroelasticity.
Syracuse University Gets CFD Work Spinning
At Syracuse University, a mixed group of both graduate and undergraduate students had the opportunity to participate in a project involving an innovative new wing design. Overseen by Prof. Thong Dang, the team sought to analyze this new design to determine its practicality and effectiveness.
Drag Effects of Heating and Cooling Cylinders in Crossflow
The reduction of the drag force on all types and shapes of objects has historically been, and remains, a major focus of aerodynamicists and fluid mechanics researchers everywhere. Aircraft, automobiles, rockets, boats, and a multitude of other devices and components suffer from the ill effects of viscous and form drag.
From CAD to CFD in Five Minutes
Customers have written many articles about how they apply Pointwise for their real applications. We have written many articles describing benefits about the features in Pointwise. However, these articles rarely describe the full meshing process in any detail.
High-fidelity, High-productivity CFD Simulations of Airflow over a Golf Club Head
The simulation of airflow over a golf club head will be used to demonstrate the complete CFD process from geometry creation through solution post-processing. Two different types of hybrid meshes are created; one is made exclusively in Pointwise, highlighting its anisotropic tetrahedral extrusion (T-Rex) meshing technology, and the other combines Pointwise with mesh generation tools developed at UTC SimCenter.