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The ability to predict something before it happens is something most of us wish we had in our arsenal. Weather forecasters think they have this ability, but we all know better. While it may be nice to know the answers to some questions ahead of time, it is essential for car manufacturers to be aware of any possible design roadblocks as early as possible in the development process. Virtual thermal analysis is a process used during vehicle development to determine whether components in close contact with hot surfaces - such as the engine or exhaust - exceed recommended temperatures. Possessing this knowledge is vital as it allows engineers the opportunity to preserve functionality and prevent accelerated aging in these components. Running a full virtual thermal analysis is ideal because it provides the most accurate results, but it is a method that because of time and cost can ideally only be run once, and at the end of development for validation only. Of course, by that point in the process it is too late in the game (or too expensive) to make major changes. After a recent review of their virtual thermal analysis process, the thermodynamics computational fluid dynamics (CFD) team at global automobile manufacturer Volvo found that Siemens PLM Software’s STAR-CCM+® software allowed them to run full vehicle thermal models at earlier stages than possible with competitors’ software.
Fact sheet on gas turbine cooling
电机等工业产品中涉及三维非对称热流动问题(如燃气轮机、汽轮机、涡轮增压器、换热器、锅炉、窑炉等),有限元分析(FEA)是从热应力和疲劳角度来评估这些机械耐久性是否满足需要或者容易出现问题。但为什么不使用计算流体力学(CFD)中的CHT功能为您的FEA工程师提供最精确的部件温度,作为其热应力计算的输入呢?当机械的流体温度随着时间变化很显著时,这是特别适用的。 当进行金属部件的热分析时,你就会发现每种传统方法都有它自己的挑战和局限: 方法一:使用有限元方法(FEA),不包括任何流体分析,因此没有考虑到流体和固体之间随时间变化的热传递的动态特性。 方法二:使用有限元方法(FEA),结合低保真度的一维流动计算工具。不考虑复杂的三维湍流流动对流体固体之间温度场的相互影响。内置在一维流动的工具中的假设不再有效或者可用。 方法三:使用有限元方法(FEA),结合三维CFD和传热系数(HTCs)。其计算很大程度上取决于每次迭代CFD和FEA求解之间的多次来回的数据传递。此方法这种方法是近似的(因此具有较低的精度),以及计算缓慢,费力,和容易出错的,不利于自动化的多仿真设计探索。 为了使在很短的时间内算得非常精确的温度场成为可能,需要使用内置在CFD工具中动态耦合方法或者共轭传热(CHT)方法,同时计算流体和固体域的温度场。 如你即将在网络研讨会中见到的,在主流的仿真软件中都具有CHT方法,...
Join us for this complimentary two-day event where Siemens PLM customers, partners and experts will showcase their industry-leading work in CFD-based engineering simulation and design-space exploration across the full range of energy, oil and gas and process industries.
Better, faster: Improving semiconductor manufacturing equipment design through simulation
The semiconductor manufacturing process involves hundreds of individual process steps, many of which involve liquid and/or gas flow. Designing the equipment to properly utilize the flow is challenging not only because of the complex geometry and multi-physics interactions, but also because process speed and reliability are paramount. Computational fluid dynamics (CFD) simulation can be a valuable tool to help the design engineer discover better designs, faster. This On-Demand Webinar provides an overview of applications in the semiconductor manufacturing process to which CFD simulation can be...
In November of 2016, over 190 countries approved the Paris agreement with the intent of reversing and mitigating the trend for growing greenhouse emissions. This is an ambitious undertaking and, if successful, would have a significant influence on global warming since about a quarter of the emissions come from the transport industry. Without changes in transportation, reversing this trend would not be possible.
내연기관 해석 및 설계 탐색 최신 기술 소개
STAR-CD®/es-ice/DARS는 내연 기관 CFD 시뮬레이션 시장을 선도하는 도구로 연소 및 배출물 형성에 대해 가장 진보된 물리적 모델을 제공합니다. 아울러 이와같은 도구와 설계 공간 탐색을 결합하면 유해 오염 물질 생성을 최소화하면서 연비 및 성능을 극대화할수 있는 보다 혁신적인 설계안을 찾을 수 있습니다. 이번 온라인 영상을 통해 Siemens PLM Software의 내연기관 솔루션에 대한 최신 개발 현황을 비롯하여 더 나은 연소 시스템 설계를 보다 빠르게 찾는 방법을 소개합니다. 본 온라인 강의에 포함된 내용은 아래와 같습니다. STAR-CD/es-ice/DARS 의 개발 동향 내연기관 CFD의 복잡한 화학 반응에 대한 최신 기술 HEEDS™를 사용한 내연기관 설계 탐색
There are few people that are busier travelling during the month of December than one Mr. S. Claus himself. When traveling such long distances it’s hard to survive on mince pies (or cookies), a glass of milk (or brandy) and a few carrots for the reindeer alone. So any chance of cutting down the time taken to deliver presents would no doubt be a welcome one. As Santa delivered his fair share of presents to me, I figured I’d give something back and help him out with something that has bothered me for a long time; the aerodynamics of his sleigh. Whilst his sleigh has stood the test of time, save...
Best practices for forced and natural convection cooling simulations
The two most common cooling approaches for electronics devices are forced and natural convection cooling. Natural convection is often considered ideal because of its inherent reliability but is limited in its heat dissipation capability. Forced convection approaches introduce additional failure points, most notably with a fan, but the dramatic increase in heat dissipation possibly makes the additional risk acceptable. Thermal simulation is a key tool used by design engineers to both assess the cooling approaches available and to guide the detailed design of the system. This On-Demand Webinar...