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Gas-Liquid Stirred Vessel
Many chemical processes involve mass transfer between gas and liquid phases. A stirred tank is a common gas-liquid contactor. Gas is injected in to the tank via sparger or lance. Single or multiple impellers are used to increase the contact are between the gas phase and liquid phase. The shear introduced by the stirring action causes the bubbles to break-up increasing the contact surface or interfacial area. The interfacial are directly determines the mass transfer across the phases and thus the reaction rates. STAR-CCM+ can model the complex vessel geometry using polyhedral or trimmed mesh...
Migration from STAR-CD to STAR-CCM+ at the BMW Group
This presentation will show the results of the overall migration from STAR-CD to STAR-CCM+ at the BMW Group during the years 2010-2011. After exploring the challenges present the BMW product development procss, the presentation will give an overview of the usage of computational fluid dynamics by the different departments at BMW. After that, the presentation will focus on the migration project. This will include the project objectives, the project timeline, the project structure as well as the collaboration between CD-adapco and BMW during the project. The last part of the presentation will...
Isosurface of Q-criterion colored by vorticity showing rotor wake from a ROBIN body. This simulation was generated using an overset mesh.
ART Grand Prix has been engaged in the Formula 3 Euroseries Championship since 2003. The regulations allow teams to work intensively on external aerodynamics to improve the performance of their Formula 3 car. Therefore, many wind tunnel tests were performed to obtain experimental data which permitted to characterize the global aerodynamic performances of the ART F3 car and to lead to many developments. To bring more efficiency into the development process of external aerodynamic parts, the use of CFD, as a tool in the evaluation and understanding of aerodynamic performances, became more and...
This paper describes the prediction of environmental loads on a typical three-leg jack-up platform under freak wave conditions. Considered were cases where the air gap is small and the hull is subject to impact-related wave-in-deck loads. The technique to predict wave loads was based on the use of a validated CFD code that solves the Reynoldsaveraged Navier–Stokes equations. This code relies on the interface-capturing technique of the volume-of-fluid type to account for highly nonlinear wave effects. It computes the two-phase flow of water and air to describe the physics associated with...
The paper describes coupled CFD combustion simulations and CAE engine performance computations to describe the operation over the full range of load and speed of an always lean burn, Direct Injection Jet Ignition (DI–JI) hydrogen engine. Jet ignition pre-chambers and direct injection are enablers of high efficiencies and load control by quantity of fuel injected. Towards the end of the compression stroke, a small quantity of hydrogen is injected within the spark-less pre-chamber of the DI–JI engine, where it mixes with the air entering from the main chamber and auto-ignites because of the...

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