Archives for CFD simulation accuracy

CFD keeps Emirates Team New Zealand on course to reclaim the America's Cup

LEAP staff, in particular our team of CFD engineers, have been watching with interest as the 2013 America's Cup unfolds in San Francisco. Despite being the oldest active trophy in international sport, the America's Cup is continually evolving thanks to an often dramatic combination of ...

Tips & Tricks: Estimating the First Cell Height for correct Y+

In previous posts we have stressed the importance of using an appropriate  value in combination with a given turbulence modelling approach. Today we will help you calculate the correct first cell height () based on your desired  value. This is an important first step as the global mesh resolution parameters will also be influenced by this near-wall mesh as...

Turbulence Part 4 - Reviewing how well you have resolved the Boundary Layer

In recent posts we have comprehensively discussed inflation meshing requirements for resolving or modeling wall-bounded flow effects due to the turbulent boundary layer. We have identified the y-plus value as the critical parameter for inflation meshing requirements, since it allows us to determine whether our first cell resides within the laminar sub-layer, or the logarithmic...

Turbulence Part 3 - Selection of wall functions and Y+ to best capture the Turbulent Boundary Layer

In recent posts in our series of Turbulence Modelling posts, we have covered boundary layer theory and touched on some useful meshing and post-processing guidelines to check you are appropriately resolving the boundary layer profile.  Today we will consider three critical questions that are often asked by CFD engineers when developing or refining a CFD simulation:...

Join LEAP at the 2013 Australian International Airshow

We know that many of our CFD customers are also very passionate about aerodynamics and aircraft design, so it stands to reason that the 2013 Australian International Airshow will be a magnet for both aircraft enthusiasts and CFD practitioners alike.  The Australian International Airshow starts today (Feb 26th 2013) and LEAP Australia staff will be attending as...

Tips & Tricks: How to interpret results for multiphase & porous domains using true velocity and superficial velocity

A commonly asked question is: What is Superficial Velocity and when do I use it?   If a fluid flows through a region that is occupied by either fixed structures (a porous region, pipe rack, catalyst bed, etc...), or shares the channel with other fluids (e.g. gas-liquid flow), there are two ways to describe the fluid...

(Part 2) 10 Useful Tips on selecting the most appropriate multiphase flow CFD models

As we discussed in our previous post, the first step when  tackling a multiphase CFD problem is to identify the key characteristics of your physical system.  Once you've done this (using our checklist if you are still new to multiphase CFD), you can begin to make informed decisions on what multiphase modelling approaches to use....

Webinar: Overview & Recent Advancements in Multiphase Flow Modelling with Dr. Markus Braun, ANSYS Inc

In advance of his visit to Australia in December, LEAP Australia is pleased to announce a webinar to be conducted by Dr. Markus Braun on Wednesday November 14th at 4pm AEDT (Syd/Mel daylight savings time).  This webinar will provide an overview of multiphase flow modelling techniques and discuss recent advancements that impact the use of...

Learn from the Expert: Training in Multiphase Flow Modelling with Dr. Markus Braun, ANSYS Inc.

LEAP Australia is pleased to announce a visit to Australia by Dr Markus Braun, Team Leader, Multiphase Development, ANSYS Inc.  Dr. Braun will be presenting a two-day course in Melbourne on Multiphase Flow Modelling, in conjunction with his visit to the 2012 CSIRO Conference on CFD in the Minerals and Process Industries.   The training will be...

Top Australian Design Award goes to Deepsea Challenger submersible

LEAP Australia wishes to congratulate Finite Elements Pty Ltd on their impressive use of ANSYS simulation technology during the design and testing of James Cameron's Deepsea Challenge submersible vehicle, which successfully completed its historic expedition to the Mariana Trench’s lowest point, the Challenger Deep, on March 25, 2012.   The Deepsea Challenger submersible became the first...

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