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Smart gas appliance manufacturers use rising gas costs to their competitive advantage
Oct29

Smart gas appliance manufacturers use rising gas costs to their competitive advantage

With gas prices predicted to skyrocket in the next few years, an opportunity exists for engineers and designers of gas-fired appliances at smart manufacturers to use CFD to gain an edge in the competitive Australian market.

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Using CFD to enhance your mixing process and drive down costs
Sep04

Using CFD to enhance your mixing process and drive down costs

Mixing processes are critical to a wide range of industrial applications across the the paint, food, pharmaceutical, minerals and water treatment industries. CFD is becoming fundamental to the successful operation of mixing processes including clarification, cell culture growth, fermentation, polymerization and blending.

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Guest Blog: The untold CFD story of James Cameron’s Deepsea Challenger
Aug26

Guest Blog: The untold CFD story of James Cameron’s Deepsea Challenger

Phil Durbin from Finite Elements explains the untold CFD story of the design and testing of James Cameron's DeepSea Challenger, a solo manned submarine that ventured 11km down to the deepest place on earth, the Marianas Trench, in March 2012.

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How can I drive Fluent UDF Parameters directly from ANSYS Workbench?
Aug13

How can I drive Fluent UDF Parameters directly from ANSYS Workbench?

Our support team is tasked with helping our customers to extract maximum value from their CFD simulations, and we are always striving to help customers who work at the bleeding edge of CFD.  A common question is: How can I drive Fluent UDF parameters directly from ANSYS Workbench? The ANSYS Fluent User Defined Function (UDF) framework gives Fluent users an almost unlimited ability to modify the physics solved in their simulation model. Customisation can extend from simple properties such as boundary condition profiles, through to complex particle-fluid interaction laws. The ANSYS Workbench interface provides the infrastructure to specify parameters that can be used to drive any simulation inputs (such as geometric dimensions or boundary condition values). By coupling the functionality of Workbench Parameters with Fluent UDF's, we can realize the ability to perform parametric studies on any parameter imaginable. The process for coupling Workbench Parameters into Fluent UDF's is as follows: In an open Fluent Window; first initialise the scheme variables in Fluent. In the TUI, type the following line: (rp-var-define ‘leap 0.0 ‘real #f) Repeat the above line of code for every variable needed by replacing “leap” with a representative variable name. This name will be used to call the variable in the UDF. In the Fluent window, go to "Define">"Parameters". In the displayed window, go to "More" > "Use In Scheme Procedure". Click the "Select" button next to the Input Parameter box at the top and click “New Parameter” to create a new parameter. Name the parameter with a representative name. This will be the name of the parameter referenced in Workbench. Click OK on the two windows until you get back to the “Use Input Parameter in Scheme Procedure” window. In the Scheme Procedure box, type the following Scheme code: (lambda (param) (rpsetvar ‘leap param)) Click the “Define” button to link the WB parameter to the UDF accessable scheme parameter. Do the same for any subsequent parameters, choosing unique and representative names for each. The parameters are now setup. To access the value in the UDF, use the following function in the source code: RP_Get_Real("leap") Where the argument in the Scheme name of the variable as defined in the rpsetvar command. Now that the associations are properly setup, you can change the value of the parameter in Workbench, causing Fluent to notify that there has been an upstream change. When you click OK, the parameter value will be pushed through to the Scheme variable. After the Scheme variable has been updated, any UDFs will have access to the new value when the RP_Get_Real("leap") function is called. NOTE: For best performance, assign the value returned from the...

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Guest Post: ANSYS CFD helps Sunswift tackle the World Solar Challenge
Apr02

Guest Post: ANSYS CFD helps Sunswift tackle the World Solar Challenge

Issue 1 of ANSYS Advantage magazine places the spotlight on the academic use of CFD and other ANSYS software.  Part of this issue is dedicated to student engineering competitions where students have the chance to use real-world engineering methods and tools such as CFD to design cutting-edge products, including race cars (FSAE) and solar passenger vehicles (World Solar Challenge).  Many of you may know that LEAP Australia has for years been a strong supporter of the University of New South Wales' Sydney-based Solar Racing Team - otherwise known as Sunswift - especially during the design and development of their latest car, Sunswift eVe. LEAP provides students with training and mentoring in CFD and FEA software, and helped implement effective CAD-to-CFD workflows and optimisation approaches in Workbench.   In this guest post, Dr. Graham Doig of UNSW's School of Mechanical and Manufacturing Engineering shares further insights into Sunswift's use of ANSYS CFD software to design what is one of the world's lowest-drag passenger vehicles. Dr. Doig is the academic supervisor for the race-winning, record-holding team - he teaches CFD and experimental aerodynamics as well as leading research at the Fluids Laboratory for Interdisciplinary Projects, and guided the core solar car aerodynamics crew of undergraduate engineers Pujith Vijayaratnam, James Keogh, Taryn Zhao and Matt Cruickshank, who were also mentored by former Formula One CFD engineer and Sunswift alumnus Dr. Sammy Diasinos of Macquarie University. Sunswift is a student-run project to design and build solar racing cars. The flagship event for the solar car fraternity is the biennial World Solar Challenge (or WSC) rally, a silent gruelling zoom across outback Australia - 3000kms from Darwin in the Northern Territory to Adelaide in South Australia - using the power of the sun to propel an international assortment of between 40 and 50 vehicles ranging from the sleek to the wacky. Power is extremely limited, so aerodynamic efficiency is king.   Sunswift started out in the mid-1990's, and in recent years has had an astonishing run of success - in 2009 our one-seater prototype Sunswift IVy won its class in the WSC, repeating that feat in 2011 and breaking a Guinness World Record for the Fastest Solar-Powered Vehicle in the interim. Put simply, we felt we'd taken things as far as we could building the "traditional" spaceship-like vehicles that have dominated solar car racing in the modern era. Basically a wing covered in solar panels with shrouded wheels underneath, European and Japanese cars of this design with several times the budget of our Aussie underdogs had been able to use satellite-grade solar cells and expensive, cutting-edge battery technology to beat us comfortably in the overall standings, despite...

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