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Aerotherm was contracted to evaluate the dynamic behaviour of a large nozzle check valve integrated into a feeder tank system forming part of a pipeline project in Southern Africa. The scenario investigated considered the dynamic response (opening) of the nozzle check valve should the head in the main pipeline suddenly be lost. Several techniques were explored to implement the dynamic plunger motion into the simulation. STAR-CCM+ enabled Aerotherm to in a very short time frame develop a practical methodology to model the dynamic plunger motion. This technique utilised user coded JAVA macros...
The current study is dedicated to understanding the wake effects of rotating vertical axis wind turbine. It is achieved by using STAR-CCM+ on the HPC clusters at Cranfield University. A number of tools in STAR-CCM+ are applied, including the wake refinement technology, morphing motion and the rigid body motion, and different turbulence models are also employed. Results from different physics models and mesh schemes are compared. The blade force prediction shows very good agreement with the measurement. This initial wake study has provided a basis for the structural analysis of the vertical...
Flow in and after the industrial bends are quite important from the flow metering point of view. There is a wide-range of studies focusing on simulations of turbulent flows through curved pipes. For flow metering it is important to know and understand that how the flow develops after a disturbance. There is little information in the literature how the flow develops after such a disturbance. In the present study, we focus on the scaled resolved by a Large Eddy Simulation (LES) of an in-plane and out-of-plane bend at a relatively low Reynolds number 20,000. LES results served as a benchmark for...
There is an ever-increasing demand to couple simulation and experiments in order to understand complex systems. Extensive research has been conducted for simplified flares in well-controlled environments. However, experimental, as well as computational, studies of full-scale flares present great challenges when characterizing the effect of operational and environmental parameters on the combustion efficiency of full-scale systems. Often, for the full-scale flare studies, the experiments themselves, along with the instrumentation, can be very complex and expensive, and can be very difficult to...
For a new solar flat-plate collector, which is composed of plane glass plates, two aspects of the development are illustrated. Firstly, the fluid distribution is examined for the occurrence of the heat-carrier fluid in the space between the plates. Starting from a circular port a volumetric flow should be generated through the interspace between the panes. For this, different geometries are analyzed. The distribution is optimized with regard to the full-volumetric flow and the pressure loss. Secondly, the natural convection is examined between the panes of the insulating layers by using...
Full CFD/CHT calculations, even including additionally combustion, are today an important step in the design process of modern gas turbines. Based on comprehensive models a numerical testing of major components is today possible within reasonable time and detection of design deficiencies becomes possible in an early stage. Thus, it is possible to reduce the number of costly hardware testing steps. Major examples in the presentation deal with the topics of comprehensive calculations for pre-mixed can-type combustors and conjugate heat transfer analyses of complex cooled 1st stage vanes and...
Lubricating-oil cooler is an important object in supporting operable state and environmental safety of turbines. Heat transfer surface of cooler contacts steam-turbine oil and contains some hundreds (or thousands) finned-tubes. Cooling agent (water) flows in the tube. That is the reason why the objective of creation economic (for computational resource and time calculation) computational model in STAR-CCM+ is important. At the same time, the model should provide design of the tube bank and mass and volume parameters of the cooler. Two ways were considered for solving this task. At the first...
The LED technology is developing rapidly, resulting in even higher efficiencies and hence a greater increase in the generated light output. As the light emitting surface (die) area is of the order of some square millimetres, high radiant flux densities in the visible part of the spectrum can be observed. Abnormally high temperatures of the phosphor or of the optics can arise from an accidental absorption of the light, caused due to the presence of insects or foreign particles in the immediate vicinity of the LED. This can lead to a failure of the LED module. STAR-CCM+ and its multi-band...
Our CFD research focuses on electronics cooling of high power density packages (~1kW/m^2) where computer cooling fans provide forced air convection and a heat exchanger/cold plate assemblage, which has a pumped fluid loop integrated within it, employs internal fluid flow to serve as an effective heat sink for the power dissipation. Our current research is aimed at modeling the heat exchanger/cold plate apparatus from k-core (k = 1100 W/m-K) material and hence showing the positive effects k-core has on enhanced heat transfer spreading. Also we are looking at fault simulations, i.e. thermal...
This presentation looks at the state of the art of simulation technology in the field of thermal and electrochemical modeling of battery cell, module and packs. Thermal modeling of complex three-dimensional systems can be considered a mature field and deployed to address many applications but the addition of electrochemistry to this system is a recent advance. This advance adds many considerations and layers of complexity, which an engineer needs to consider when conducting simulations. The presentation will highlight the critical aspects of such simulations and highlight their importance...

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