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How do we meet the needs of industry in the 21st century while researching and developing technology for future generations? How do we prepare tomorrow’s engineers for engineering success on real-world applications? The answer is simple: we must all work together. By “we,” I mean academia, industry and (for the purposes of this Blog) CD-adapco as an engineering tool provider.

Academia and industry have been successfully collaborating together for over 100 years. When industry and academia work together to push the boundaries, they form a powerful team capable of driving innovation and economic growth. Moving forward, there needs to be more open communication and collaboration between industry and academia to understand and address the qualities and skills engineering graduates should possess when transitioning from academia to industry. This means collaboration needs to expand from research labs and into the classroom.

Bridging the Gap Between Academia and Industry

The other day, my designing skills were put to the test. A tad too far. I was using the 3D-CAD modeler in STAR-CCM+. I mean my final design objective was nothing compared to what some of the STAR-CCM+ users are able to build: did you ever see this STAR-Bike built in 3D-CAD?!

 

STAR-Bike image

It’s been said that education and competition are two of the most important ingredients in life. There is no doubt that education (whether it be formal or informal) is a primary key to success, and the roots of education reside in competition. Throughout your educational career, you will continuously compete and I can guarantee - it won’t stop when you graduate! Whether you are in a contest to be the fastest runner on the playground, the National Spelling Champion or up against a number of other MBAs for a plum job at a Fortune 500 company, competition will always play a part in your life.

To recognize and encourage the innovative use of our software, the CD-adapco Global Academic Program is announcing the first ever STAR-CCM+ SIMULATION APP CONTEST! Using the Simulation Assistant in STAR-CCM+, we challenge you to develop an App which captures best practices.

2D simulation is a great way to test out designs and boundary conditions, personally I use it all the time when I am setting up a complex case for the first time or just playing with a new feature.
Historically in STAR-CCM+ there wasn’t a pipelined way to build and run 2D meshes, but now with version 9.06 there are two new features that will put that problem to rest.

2D Mesher in STAR-CCM+

Being able to plot solution quality metrics while your simulation is running, that is, live-processing as opposed to post-processing, is one of the most distinctive functional aspects of STAR-CCM+. This lets you critically interrogate your results and make changes on-the-fly, thereby increasing your productivity. There are many very capable 3rd party plotting tools available. However working with them requires exporting and importing data, adding several steps to your workflow and making it difficult to automate. Still, there’s an argument to be made that plotted results need to be legible and, to a degree, customizable. With this release, we have targeted visual plot quality as an area for improvement.

residence time on several axial cross sections for flow in a simple curved tube

When we initially consider the analysis of unsteady phenomena in turbomachinery, aeroelasticity and aeroacoustics, we’re quickly confronted by the simulation cost – transient analyses by their very nature will simply take longer to run compared to steady ones. And for these types of problems, where the simulation objectives (understanding of flutter and limit cycle oscillations for example) demand a time-dependent treatment, the time steps need to be small and the physical time required can be long. Not that this isn’t challenging enough, usually, the entire machine needs to be modeled at a high level of spatial fidelity, thereby driving up the size and cost of the analysis even further. But, all is not lost– enter the Harmonic Balance method, first introduced with STAR-CCM+ 4.04 in 2009, capable of delivering at least a 10-fold reduction in your time to a solution. And, that’s not the only benefit to be had with this approach – it’s possible to mesh just a single blade passage through all the blade rows in your machine and obtain a solution which varies from blade-to-blade, capturing critical blade row interactions.

Harmonic Balance post-processing

Overset Mesh is one of the coolest technologies in STAR-CCM+ as it allows objects to move around your computational domain freely without tying your mesh in knots, be that an overtaking car, an excavator arm, or the complex multiple motions involved in a production line. The motion does not even have to be prescribed, the Dynamic Fluid Body Interaction (DFBI) model allows you to solve for motion, in six degrees of freedom or less, based on the forces and moments acting on a body, such as a boat on a free surface, or a ball in a ball valve. To date, however, there has been one major constraint when using Overset Mesh, namely that all gaps had to be resolved with at least 2-4 cells, however small the gap, for Overset Mesh to work correctly. This limitation meant that for some cases with very small gaps, users had to choose between excessive cell counts or increasing the gap size in an unphysical manner.

No Need to Mind the Gap

The upcoming release of STAR-CCM+ v9.06 removes that constraint with the introduction of gap handling for Overset Mesh via the new “Zero Gap” Interface type.

So, show of hands, who has wrapped a surface and asked: "This surface is clean, why do I have to wrap it?".

The good news is that a new method introduced in STAR-CCM+ v9.06 will allow you to selectively wrap dirty surfaces, while preserving those that are clean.

Partial Surface Wrapping Schematic

지난 블로그 포스팅에서는 최적 설계 도구의 향상된 기능에 대해 언급하였습니다. STAR-CCM+ v9.06에서는 형상의 변형을 파라미터 없이 자유현상으로 더 쉽게 수행하기 위해 격자 몰퍼의 사용성을 향상시킴으로써 최적 설계의 다른 측면을 위해 힘써 왔습니다.

올 초, 우리는 몰퍼를 사용해 형상의 모양을 변형시킬 수 있는 격자 변형 모델을 출시하였습니다. 이는 CAD 데이터 원본을 이용할 수 있을 뿐만 아니라, 실제 소프트웨어에서 그것을 수정하기 위한 중요한 기능입니다.

Control points illustrate potential improvements

What is the common element in solving problems such as vortex induced vibrations, mixing in unconventional geometries, estimating separating efficiency of cyclones, refractory damage in sulfur recovery furnace or accurately calculating performance of pumps?
Chemical and Oil & Gas Conference Houston 2014

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Brigid Blaschak
Communications Specialist
Dr Mesh
Meshing Guru
Stephen Ferguson
Communications Manager
Sabine Goodwin
Senior Engineer, Technical Marketing
Joel Davison
Product Manager, STAR-CCM+
Matthew Godo
STAR-CCM+ Product Manager
Tammy de Boer
Global Academic Program Manager
Prashanth Shankara
Technical Marketing Engineer