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First of all, the computational process in SPEED and the coupling process with STAR-CCM+ are described in this presentation. For an accurate prediction of the heat transfer between stator copper parts (slots and windings) and coolant, detailed models of these parts have been created and used for the modeling of the complete electric motor in STAR-CCM+. The numerical results are compared for different load cases with experimental results under laboratory conditions and numerical results obtained with the software MotorCAD. The comparison shows a very good agreement with the experimental...
Valeo Climate Control has been using CD-adapco's software for CFD simulation since 1997. Since 2000 we started to develop automatic processes for HVAC CFD simulation which concerns evaluation of basic characteristics of our product, air-condition units for the automotive industry. These processes were developed for STAR-CD. In 2005 our US division began to migrate to STAR-CCM+ and at the same time started to develop a new tool based on JAVA which ensured stability, robustness and automation of the CFD simulation process on HVAC. The same tool is now being used with STAR-CCM+ for different CFD...
The aluminum EGR cooler with pre-cooler integrated has been developed using CFD analysis. Because the temperature of exhaust gas in commercial CNG engines exceeds the temperature limit of EGR valve system, a new cooling strategy is required. For the concept design of the cooler, efficiency is first evaluated by STAR-CCM+. Moreover, the efficiency of the cooler with external pre-cooler has been studied for the comparison. Conjugate heat transfer among the exhaust gas, engine coolant and EGR cooler is modeled. For considering wave EGR cooler fin effect, the simplified tube fin model is used. In...
The thermal prediction of vehicle body environments is of high importance in the design, optimization and management of vehicle power systems. Within the pre-development phase of a vehicle's production process, it is important to understand and determine regions of high thermally induced stress within the exhaust system itself and surrounding underbody components. This early stage of prediction allows engineers to rapidly modify the design or alter component material characteristics without incurring significant costs related to experimental testing. Today's current industrial standard of...
Conventional treatment of Hypoplastic Left Heart Syndrome (HLHS), the Norwood operation, establishes univentricular circulation through a series of highly invasive reconstructive procedures. The relatively new Hybrid Norwood (HN) operation involves a less invasive strategy that avoids a cardiopulmonary bypass (heart-lung machine), deliberate cardiac arrest and circulatory arrest of the patient in the neonatal period . We present multiscale model of the entire circulatory system developed utilizing an electrical lumped parameter model (LP) for the peripheral or distal circulation coupled with...
To exclude cerebral aneurysms from the parent artery circulation, Flow Diverters (FD), which are designed as stents with a dense mesh, are placed across the neck of the aneurysm. The desired result of this procedure is the reduction of blood flow velocities and pressures inside the aneurysm to prevent rupture. Computational Fluid Dynamics (CFD) can be employed using the concept of virtual surgery to simulate the effects of the FD and ensure a successful treatment. Here, we present a comparison between simulation of the FD porosity using Darcy’s law (Siemens AG, CFD Research Prototype) with...
The USNRC office of Nuclear Regulatory Research has completed a series of simulations to study the stratification and entrainment behavior of a sodium pentaborate solution injected from the Standby Liquid Control System (SLCS) into the lower plenum of a Boiling Water Reactor (BWR). The simulation domain includes the BWR lower plenum along with the control rod drive tubes and major support structures as well as the SLCS piping. A challenge for the Computational Fluid Dynamics (CFD) model development is the relatively large and complex domain along with the large variation in scales between the...
A virtual reactor model for a Westinghouse Pressurized Water Reactor (PWR) has been developed by the Consortium of Advanced Simulation of Light Water Reactors (CASL). The model includes all the geometric details of the Westinghouse PWR internals and the 17x17 fuel assemblies. The model was built to obtain the high fidelity data required to solve the challenge problems faced by the nuclear industry. In the virtual reactor, the flow and the conjugate heat transfer were modeled. The fission power profiles for each fuel rod were produced by the Westinghouse neutronic code ANC. The model was...
Evaluating aerodynamic drag of class 8 trucks is critical for improving fuel economy, meeting EPA targets and maintaining a competitive edge in the industry. For a standard tractor trailer configuration, aerodynamic drag is responsible for approximately 30% of total fuel consumption. Reducing drag by 3% would improve fuel economy by 1%, which demonstrates the need for accurate methods to predict aerodynamic drag. Depending on available resources, truck companies may use one or more tools to evaluate drag, including wind tunnels and CFD software. This presentation focuses on the application of...
Clients using STAR-CCM+ for vehicle simulation have been growing at a steady rate. A wide range of applications are being used in the ground transportation sector, all the way from vehicle aerodynamics, passenger thermal comfort, to HVAC and component analyses. Clients today use STAR-CCM+ to optimize vehicle aerodynamic designs. Other clients are taking advantage of automation in STAR-CCM+ to achieve one day turn-around for front end cooling. The ability to run combined fluid solid models are allowing engineers to start modeling thermal cycles which in the past have been limited to just test...

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