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Large Structures CFD Simulations for Water & Wastewater Treatment Plants
Degrémont is a global leader in the design, build and operation of water and wastewater treatment plants all over the world. These plants employ a number of components standardized by Degrémont but since each plant is unique, bespoke design is necessary in both new-builds and retrofits when it comes to the large treatment structures. Together, all of the components that form a treatment plant intend to change the physical and chemical characteristics of the water to suit the delivery needs (potabilisation and/or pollutants removal by filters, settlers, biological aerated tanks, to name a few...
Coupled Simulation of Multiphase Fluid Flow & Multiple Body Motion in Overlapping Overset Grids: Oil Flow in a Rotating Spur-Gear System
A common difficulty in simulations of complex fluid flow problems is that not every geometry especially for the case of relative motion between components can be well represented using a single, contiguous grid. Overset grids can be used to track relative motion with computational efficiency. Recent advances in high performance Computational Fluid Dynamics (CFD) software have enabled the coupled simulation of multiphase fluid flow and rigid body motion in overlapping overset grids. A CFD method is developed and applied for the simulation of oil flow in multiple rotating spur-gear systems with...
STAR-CCM+ an Invaluable Tool for Coal Fired Power Plant Design Optimisation
Aerotherm and Steinmüller Africa (a member of the Bilfinger Power Systems group) collaborated to help improve the performance of a coal-fired furnace at the Komati Power Station in South Africa, as part of a recent return-to-service project involving that station. As the decades-old furnace was re-introduced to service, some combustion-related problems resulted, in part because the moisture level in the coal that was used exceeded original design limits. The furnace comprises a common windbox and 12 pulverized-fuel (PF) swirl burners. The ultimate business goal of the South African power...
Fluid Distribution & Investigation of Heat Transfer on a New Type of Solar Flat-Plate Collector
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...
Engineering Success by Application of STAR-CCM+ for Modern Gas Turbine Design
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...
In this work, we investigated the specially resolved heterogeneous catalysis of the Dry Reforming of Methane (DRM) in terms of CFD simulations. A catalytic, spherical fixed-bed reactor is simulated with a small tube-to-particle-diameter. The randomly packed bed (D = 16.2 mm, dP = 4 mm, H = 40 mm) was generated using the Discrete Element Method (DEM), which consists of 113 mono-disperse spheres. A detailed reaction mechanism is implemented involving 42 irreversible reactions with 12 surface-adsorbed species and 6 gas phase species. The chemical composition equations are calculated by DARS-CFD...
Shape Optimization of a Top Entry Mixer - A Case Study using CAESES / STAR-CCM+
Upfront CAE studies performed as early as possible within the design and development process are required for thorough design explorations and formal optimizations. In this presentation, a novel approach is presented in which STAR-CCM+ is coupled with CAESES and an automated shape optimization is performed. The case study is that of a top entry mixer which is typically used in the process and chemical industries. The coupling of the softwares along with the process chain is elaborated and the resulting mixer shapes are compared to standard designs used in industry today.
Upfront CAE studies performed as early as possible within the design and development process are required for thorough design explorations and formal optimizations. In this presentation, a novel approach is presented in which STAR-CCM+ is coupled with CAESES and an automated shape optimization is performed. The case study is that of a top entry mixer which is typically used in the process and chemical industries. The coupling of the softwares along with the process chain is elaborated and the resulting mixer shapes are compared to standard designs used in industry today.
Design & Evaluation of a Passive Micromixer with Curved Shape Obstacles & Grooves in the Mixing Channel
Micromixers are key components in several micro electro-mechanical and lab-on-a-chip systems, which are increasingly applied in fields such as chemistry, chemical synthesis, bio-technology and environment control. A CFD-based study is presented, which includes design modeling, flow and mass transfer simulation and geometric parametric analysis of a passive micromixer that presents curved shape obstacles and grooves in the mixing channel as main geometric features. The parametric study helps to identify the effect of some geometric dimensions on mixing quality, pressure loss and shear stress...
CD-adapco's vision of STAR-CCM+ in Chemical Industry
STAR-CCM+ is used in the chemical and process industries widely. CD-adapco is investing in further development of STAR-CCM+ to address the challenging needs of future in this industry. In this talk, some parallels and contrasts on the use of CFD in the automobile and chemical industry will be drawn. Criteria for success will be discussed followed by an outline of the future developments.

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