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New Software: CFX-5.5.1 Released
Posted Thu August 08, 2002 @06:20AM
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News CFX is pleased to announce the release of CFX-5.5.1, the latest version of this industry leading Computational Fluid Dynamics (CFD) software system. This release, which started shipping to customers in July, allows engineers to apply CFX-5's unsurpassed robustness, accuracy and scalability to a whole new range of industrial flows by providing new models and offering near total interoperability between the wide range of existing models. As an example, multiphase batch mixer analyses can now combine existing coupled multiphase fluid models with proven Multiple Frame of Reference (MFR) technology to quickly solve these physically complex flows. The effects of chemical reactions and heat transfer can also now be included in MFR models. In addition, all models can also be used in conjunction with CFX-5's existing Generalized Grid Interface capability.

Dr. Ross Haywood with Hatch Ltd., Australia has been an early user of the new release. "I found the new release to be absolutely first-rate," Haywood said. "The ability to use all of the models together makes it possible to apply CFX-5 to a much wider range of applications. That's significant, because CFX-5 has long been unique in its ability to solve larger and more complex problems than the other codes that I am familiar with. I am extremely pleased at the rate at which this code has been improving."

Major enhancements have been added to multiphase and free surface capabilities. The number of phases in a multiphase analysis is now unlimited, so that fluidized beds and particle separators with multiple particle sizes can be simulated with ease. The free surface flow model has been expanded to include a bulk energy equation, low speed variable density, fluid-specific additional variables and fluid-specific multicomponent fluids. These capabilities extend the applicability of free surface models to include, for example, mold filling and contaminant dispersion. A surface tension model is now available which allows the engineer to predict flows accurately in capillary tubes and the coalescence of liquid droplets.

( Read Full Article | New Software )

Application: Endangered Fish Benefit from CFD
Posted Wed August 07, 2002 @10:19AM
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Application Environmental applications of computational fluid dynamics (CFD) have become more common in recent years with the increased availability and ease of use of commercial grid generation software and CFD solvers. Pacific Northwest National Laboratory has been supporting studies by the US Army Corps of Engineers, Portland District by creating and applying Reynolds-Averaged Navier Stokes (RANS) CFD models to the Columbia River and portions of the dam structures at several hydroelectric projects, including the tailrace of The Dalles Dam.

Numerical models in The Dalles tailrace are being used to support efforts to reduce fish mortality associated with fish passaging of the hydroelectric project. At The Dalles, several locations have been proposed for a high flow outfall that would move fish around the dam rather than through the turbines or over the spillway.

( Read Full Article | Application )

Application: Reducing NOx Emission from Gas-Fired Furnaces
Posted Wed July 31, 2002 @09:08AM
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Application By Sudarshan Kumar, CGPL, IISc, India

One of the oldest and finest establishments of its kind in India, the Indian Institute of Science (IISc) has grown into a premier center of research and advanced instruction. Its Combustion Gasification and Propulsion Laboratory works mostly on fundamental research in combustion and its applications in industry.

A recent research project focused on investigating the effects of flow recirculation on the efficiency of a gas furnace, the goal being to optimize the position of the fuel nozzles. CFD simulations were conducted in parallel with experimental work on a typical preheated-air furnace.

( Read Full Article | Application )

New Software: CFX-BladeGen 4.1 Released
Posted Tue July 30, 2002 @03:36PM
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Geometry CFX has released version 4.1 of itís market-leading turbo-machinery software, CFX-BladeGen. The new version incorporates many new or enhanced features to provide designers with the complete system for 3-Dimensional (3D) blade design and automatic performance evaluation. The new features include a parametric study tool which automates batch studies of a range of conditions, and meridional functions to define trim profiles and control curves.

The user interface has also been significantly enhanced to further improve useability.

Add the rapid performance-screening "Plus" module, CFX-BladeGenPlus, and harness the power to readily obtain 3D viscous solutions with a level of effort equivalent to streamline curvature approaches.

( Post Comment | New Software )

New Software: Visualization Provides A Deeper Understanding of Complex Data
Posted Tue July 30, 2002 @10:57AM
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Post Processing Virtual Vantage visualization software from Fuel-Tech N.V. uses virtual reality technology to help provide a much deeper and faster understanding of complex data sets, such as computational fluid dynamics (CFD) results, than can be obtained with conventional post-processing tools. It is difficult and time-consuming to identify areas that are critical to solving the problem or optimizing the design when viewing CFD results in the conventional manner, as contour plots overlaid on cross-sections of the solution domain. Virtual Vantage, on the other hand, allows users to maneuver through the solution domain from a first-person perspective in three-dimensional space while viewing critical dependent variables as color contours.

CFD has become an important design tool in nearly every industrial field because it provides values for fluid velocity, fluid temperature, fluid pressure and species concentrations throughout a flow domain. But CFD analysis to date has been limited by post-processors that provide results relative to a fixed user position that discourage discovery. Virtual Vantage software harnesses the power of virtual reality to convert the flow domain into a computer-generated world that the user can immerse himself or herself within in order to bring their fullest potential of human thought and skill to bear on the problem.

( Read Full Article | New Software )

Application: Coupled 1D-3D Analysis Improves Engine Design
Posted Fri July 26, 2002 @03:50PM
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Application BMW Motoren GmbH designs and manufactures automotive engines for use in passenger cars. The factory at Steyr, Austria manufactures over 60% of all BMW's engines.

Engine cooling simulation has been done for several years with 1D tools being used to determine pressure losses and flow rates in cooling circuits. The more complex flow patterns in cylinder head and jacket are simulated with full 3D CFD to determine convective heat transfer coefficients.

BMW simulates the vehicle's coolant flow with FLOWMASTER2, which enables a one-dimensional description of the whole system. Flow in the engine coolant jacket, which is much less predictable, is described three-dimensionally by the CFD programme STAR-CD, from CD-adapco.

( Read Full Article | Application )

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Software Cradle

  • Interview with the Head of CFX Engineering Software Development
  • A Visit Inside CFX Engineering Software
  • Endangered Fish Benefit from CFD
  • Optimization of Marine Components Using CFD
  • A Case for Application-Specific CFD Meshing
  • Are Structured Methods Still The Workhorse?
  • Do GUIs Help or Hurt?
  • How Multigrid Solver Acceleration Works
  • CFD Modeling of an Internal Rotary Pump
  • State of the Art in Grid Generation
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