Multiphase modeling is coming of age in 2015 in STAR-CCM+ with the addition of a number of smart hybrid multiphase models that open up a range of new and exciting applications.
STAR-CCM+ now has no fewer than six multiphase models, each best suited for a particular range of applications and computational budgets, namely Eulerian Multiphase (EMP), Volume Of Fluid (VOF), Mixture Multiphase (MMP), Dispersed Multiphase (DMP), Lagrangian Multiphase (LMP), the Discrete Element Method (DEM), and the Fluid Film model.

In many applications, however, no one model is suitable for all the flow regimes that occur simultaneously at different points in the computational domain, and ideally we would like to combine the benefits of multiple models in a single simulation. Now with models such as the VOF-Fluid Film multiphase interaction model, this is possible.

STAR-CCM+ Part Coating Simulation

STAR-CCM+ v10.02 GPU UtilizationWe get a lot of questions about GPUs, and I think it’s fair to say there’s a lot of confusion and indeed misinformation on the general topic. So, to start things off, let’s clarify what we mean by GPU utilization. GPU is the abbreviation for Graphics Processing Unit. This aim of this enhancement is to enable you to draw (or render) images faster, using your local graphics resources, resulting a better interactive experience when working with STAR-CCM+.

Rarely in life do we get the chance to get more for less, and the world of simulation is no different, or at least not until now.

Typically in our simulations we have to make compromises, and in choosing those compromises we need to know which models will give us the best information at the minimum cost. We must also understand the assumptions our choices carry and how these might influence the decisions we make. This after all is the art of being a good Simulation Engineer.

Before we begin and lose ourselves in the wonders of multiphase, imagine if you will a beach, the sun is beating down, the wind is blowing and the surf is up. The sea looks a little rough, but being a good Simulation Engineer the foamy seas pose no worries to you and your recent lunch…..

Island Eisberge am Schwarzen Strand 19

James Clement tries to capture "the big one".One warm July morning buddy of mine and I decided that we needed to hit the lakes and go catch "the big one". We headed out just as dawn broke so we can find that big old bass that I knew was hidden somewhere in our favorite spot. Once we got the boat in the water it is about a 15 minute ride across the lake over to the spot where our fish was bound to be. So a cup of coffee in hand we sped off across the lake, during that time one’s mind always tends to wander and apparently mine wanders back to meshing. Looking across the still lake nothing much is going on but behind the boat is a whole different story; the propeller is stirring up quite a bit of turbulence and the hull is producing a massive wake, this is where the action is. So I ask to myself, what kind of tools would our users need in order to build meshes automatically in order to capture this type of phenomena? A tool that would allow efficient meshes and could give accurate answers with a minimal cells count. STAR-CCM+ v10.02 meshing operation allows users to refine wake zones in both the polyhedral and the trim meshers as well as give wake a draft angle so that the refinement zone expands as it moves away from the model.

STAR-CCM+와 혁신적인 격자프로세스의 등장으로 빠르고 쉬게 격자를 생성할 수 있게 되었습니다. 10.02버전은 보다 더 지능적이고 쉽게 격자를 생성할 수 있는 새로운 기능들이 추가 되었습니다. 여기서 이야기하려는 도구는 적절하지 않은 크기와 분산된 셀로 인한 격자의 이산화 오류를 강조하기 위해 Adjoint의 능력을 활용한 Adjoint 오류 평가입니다. 이러한 이산화 오류는 엔지니어링 결과의 정확도에 영향을 미치게 됩니다.

Adoint error estimation behind aerofoil STAR-CCM+

You may have noticed that in the upcoming STAR Global Conference, there will be an inaugural Genius Competition designed by our very own Dr Mesh. Wanting to find out more about the competition myself, I recently caught up with Dr Mesh at the Paradise Point Resort and Hotel in San Diego where he was catching some New Year sunshine and inspecting the facilities for the upcoming STAR Global Conference in March. He was looking relaxed and tanned as he emerged from the blue waters of the Pacific Ocean onto the white sandy beach, stopping only to create some weird looking cell shapes from the moist white sand at the water’s edge. He pondered for a while as he gazed out over the ocean and it was a good opportunity for me to tip toe around the polyhedral sand sculptures and ask him some questions about the new STAR-CCM+ Macro competition that would be held during the conference.

It is our pleasure to announce James Bertwistle as the winner of the 2015 CD-adapco Calendar Contest. This year again, contestants from all around the world submitted images of exceptional quality. James’s entry, which represents the Wind Effects around Tall London Buildings, scooped the first prize owing to its beautiful and accurate representation of urban wind flow, as used in environmental impact assessments for new building developments during the planning application process.

CD-adapco calendar contest winner James Bertwistle and his team at WSP

James is an expert user of STAR-CCM+®, having started working at WSP nearly 10 years ago as a graduate from the University of Leeds CFD Masters course. He is now the Associate Director of WSP’s Computational Fluid Dynamics group in the UK, leading a team of CFD modeling engineers specializing in performance-based design for the built environment.

I met up with James to find out exactly how he applies simulation to real-world engineering problems.

휴스턴의 회의실이나 휴게실에서 시간을 보낼 때 대화 주제들은 곧 그 날의 유가 가격으로 바뀌게 될 것 입니다. 세계 경제 성장률 저하와 북미 Shale 가스 공급 혁명으로 유가 가격은 지난 3달동안 약 30% 하락했습니다.
제가 이 블로그에 쓴 것과 같이 서부텍사스산 중질유는 5년만에 최저가로 거래됨에 따라 업계는배럴당 70달러로 운영하는 것을 포기해야 할지를 심각하게 고민하게 되었습니다.

Engineering Design in a time of Falling Oil Prices

이러한 새로운 패러다임에 대응하려는 각 기업들의 관점이 다를 수 있지만, 대부분은 안전성을 해치지 않으면서 시간과 비용을 줄이는 노력 (혁신적이고 양질의 제품과 솔로션 납품)을 지속하려 합니다.

기업들이 점점 해석 기반의 최적화에 의존함에 따라 우리(CD-adapco)가 제공하는 엔지니어링 해석 툴들이 무엇보다도 중요한 역할을 할 것으로 생각됩니다. 이런 선도 기업들은 시뮬레이션을 통해 엔지니어링 비용 및 시간을 줄이고 있습니다.

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

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+


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Brigid Blaschak
Communications Specialist
Matthew Godo
STAR-CCM+ Product Manager
Stephen Ferguson
Marketing Director
Dr Mesh
Meshing Guru
Joel Davison
Lead Product Manager, STAR-CCM+
James Clement
STAR-CCM+ Product Manager
Sabine Goodwin
Director, Product Marketing
Prashanth Shankara
Technical Marketing Engineer