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This presentation illustrates a new application of the previously developed 1D transient DARS Catalyst model for the simulation of a Selective Catalytic Reduction (SCR) catalyst. Initially demonstrated for NOx-Storage Catalyst (NSC), the DARS Catalyst model uses a single-channel or a set of representative channels for the simulation. This model is fully valid and employed further for the SCR catalyst. Each channel is discretized into a number of cells. Each cell is treated as a Perfectly Stirred Reactor (PSR) with a thin film layer for washcoat treatment. Three global parameters are used to...
Counterflow burners consist of steady, axisymmetric, laminar flows of two counterflowing reactant streams toward a stagnation plane. These burners can be used to experimentally study and develop detailed chemical mechanisms of combustion under a wide range of conditions. Global flame parameters such as the critical limits of extinction and autoignition, as well as flame structure, including flame temperatures and species concentrations can be measured and tested against established reaction mechanisms using 1D numerical model with known conditions at the duct exits. This presentation is a...
We have been expanding our application coverage for reacting flows that require coupling of different processes with a wide-range of length and time scales. We capture these interactions by using a combination of online as well as offline computations that enables us to perform advanced reacting flow calculations incorporating finite-rate chemistry while keeping the computational time manageable. Our models have been extended to work in multi-phase as well as with segregated and coupled flow solvers. Examples from chemical process and combustion applications will be shown that will include...
A 3D CFD model is developed for analysis of transient soot filtration processes in a conventional wall-flow type Diesel Particulate Filter (DPF). The primary objective of this study is to quantitatively predict the local values of soot filtration parameters, such as porosity, permeability, collection efficiency and deposited soot mass, within isotropically discretized computational domains in the multi-layered filter wall region. Standard CFD codes do not have ability to generate structured meshes with ordered cell index nor allow mathematical recursive operation using user field functions...
New combustion concepts like PPC and RCCI have demonstrated very high indicated efficiencies together with a potential for low engine out emissions. But the implementation of those combustion concepts in engine concepts remains a challenge. A number of issues like boosting, load range, EGR control and transients have to be addressed. Integration of different technologies into an engine concept is done with gas exchange simulations. But how is the combustion in the gas exchange simulations modeled when new combustion concepts are utilized? Iterating with 1-cylinder testing and 3D combustion...
Commercial fluidization technologies can benefit from a deeper understanding of the interplay between the dynamics of the fluids and solids in these multiphase processes. Dispersed-phase and particulate systems, such as precipitation, crystallization, particle formation in aerosols and fluidization, can be modeled using the Population Balance Equation (PBE) approach to describe different particle properties. In our research, we have implemented this PBE approach into our High Performance Computing (HPC) STAR-CCM+ simulations. In particular, we are using the Direct Quadrature Method of Moments...
A CFD study using STAR-CCM+ 7.04 is performed to simulate an industrial heater with burners firing refinery gas fuel. The heater has been reported with short run length due to coking inside the process tubes. Heater, burners and combustion air duct are included in the modeled geometry. Turbulence, combustion and radiation models are activated to simulate the environment inside the heater. System analysis is performed such as combustion flame pattern, temperature and velocity fields, heat flux and temperature distribution at various locations etc. Non-uniform heat flux distribution on process...
Polyester based Multi-Layered Films (MLFs) form a major part of DuPont Teijin Films' (DTF) product portfolio. Such MLFs are formed when different polymer melt layers come together in a process known as coextrusion. The main coextrusion geometries used at DTF are: • an injector block linked to a die and • a multi-manifold die. As the thickness and melt flow properties of the layers become more differentiated, it becomes more difficult to control individual layer width and thickness of an MLF. CD-adapco’s STAR-CCM+ is used to improve the layer control of current MLFs, reducing the potential...
STAR-CCM+ is a leading CFD software used in a wide variety of industries. Chemical and allied industries increasingly use STAR-CCM+ for design, optimization and troubleshooting of process plants. CD-adapco has made tremendous progress in CFD simulation capabilities of STAR-CCM+ over the past few years, making it a prominent simulation tool for chemical and pharmaceutical industries. A review of key capabilities relevant to the chemical industry emphasizing CD-adapco’s commitment to the chemical industry will be given. These will be put in perspective of the needs identified by the industry...
As capabilities and features in STAR-CCM+ continuously become more numerous and sophisticated, there is an increasing demand in Verification, Validation and Visualisation. Especially in general engineering and building services, where customers do not have a distinct CFD background, the simulations have to bear more critical assessments because of targeting a more sceptical audience. Thus, it is extremely essential to validate simulation against experiment, empirical approach and literature most intelligible to a wide range of customers and show the results in a vivid and realistic way. Still...

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