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Presentation includes the overview of DEM capabilities in STAR-CCM+ and examples with analysis of DEM and DEM coupled to CFD simulations for Chemical Processing Industry.
A flash boiling phenomenon differs from the normal evaporation (isobaric heating) and where a rapid evaporation occurs due to rapid pressure drop under saturation pressure condition. This report explains the physical process of flash boiling phenomenon for single component fuel and further describes the evaporation enhancement effect when multicomponent fuel is applied. The fuel for normal engines is multicomponent fuel and when mixing fuel components, which have largely different boiling temperatures, two phases region is formed on the pressure-temperature diagram. This allows evaporation...
The evolution of nuclear reactor design is being greatly influenced by the availability of new, versatile next-generation tools. Multi-physics analysis of nuclear reactor systems is pushing the operational limits of reactors and fuel, with large impact on the economics of the plants, while simultaneously improving the safety standards. Computational Fluid Dynamics, used in combination with neutronics, structural, material performance and system analysis tools, has enabled nuclear operators and vendors to greatly enhance the capacity and availability of current reactors. The increased adoption...
We have been expanding our application coverage for reacting flows that requires coupling of chemistry and flow physics that span a wide-range of length and time scales. We capture these interactions by using a combination of online as well as offline computation using our chemistry tool called DARS to incorporate finite-rate chemistry effects while keeping the computational cost manageable. These models have been extended to work in multi-phase as well as with high-speed flows. Examples from chemical process and combustion applications will be shown that will include surface reactions, multi...
The method of ignitability estimation simulation of the spark plug in engine cylinder that considered engine conditions and misfire was developed. This method is consisted by creating engine model from 3D scan, flow simulation model in engine cylinder with verification by PIV, spark displacement model and detailed chemical kinetics of gasoline surrogate fuel. The ignitability of four types of spark plug with different shapes of ground electrode was calculated. In this result, correlation was seen with the experiment. In another calculation, in-cylinder flow was found out to have the largest...
Sound source prediction/reduction has become a critical topic of investigation in the automotive and household appliance industries. Acoustic comparison can be achieved using the steady state result to minimize computational cost especially when a particular model has to be chosen amongst several test geometries. This presentation illustrates several examples of aeroacoustic calculation performed by STAR-CCM+.
An overview is presented of key methodologies in STAR-CCM+ and STAR-CD for simulating disperse multiphase flows involving droplets, solid particles and/or liquid films, including: atomisation; particle dynamics and heat/mass transfer; wall impact and erosion; and liquid film dynamics, heat/mass transfer and melting/solidification. Examples are shown of validation studies and applications in the aerospace, automotive, oil/gas and manufacturing and medical fields.
New capabilities in modeling multiphase flows using the Eulerian Multiphase (EMP) model are demonstrated by examples. These new capabilities include granular model for multi-size particle flows, RSM for turbulent multiphase flows, multi-component boiling model for evaporation of chemical species and the Adaptive-MUSIG (A-MUSIG) population balance model for poly-dispersed flows.
Unexpected and costly thermally induced failures have been reported at power as well as process plants. The failures are caused by complex thermal-hydraulic mechanisms classified as Thermal Stratification, Cycling and Striping (TASCS). These mechanisms can cause fatigue cracking, pipe deformations, pipe support damage, and additionally lead to anticipated equipment failure. Three-dimensional, transient CFD simulations are necessary in order to predict the nature of these failures. The analyzed phenomena are diverse and complicated because of the wide variety of thermal-hydraulic and...
The presentation describes the evolution of features made available in recent releases and new capabilities that will be available within the forthcoming v4.22 release and their application to in-cylinder engine calculations. These include: Further development of combustion models including dual-fuel combustion such as diesel-natural gas; Support for 3rd party chemistry within the advanced ECFM and PVM-MF combustion models; Crank-angle resolved Conjugate Heat Transfer (CHT) analysis and automated meshing using STAR-CCM+.

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