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This paper investigates the thermal performance of a three-phase 10kW flux-switching permanent magnet (FSPM) machine used as an integrated starter generator (ISG) for hybrid electric vehicles, where the temperature rise experiments are conducted under different operating conditions. Also, the thermal analysis of the FSPM machine is simplified into one-dimensional steady heat conduction with two heat...
To improve the efficiency of a gravitational water vortex turbine, the production of a strong vortex, capable of driving a runner for the generation of electricity is very important. Various design configurations have been investigated using the computational fluid dynamics approach. A cylindrical tank with a discharge hole at the bottom center is the most suitable configuration to generate a water...
The flow field in the herringbone grooved bearing was simulated by computational fluid dynamics software FLUENT, the comparison of static characteristics was made between the modal considering effect of viscosity-temperature or not. Temperature field distribution on the surface of herringbone grooved bearing was product in the case of different structure parameters (including spiral angle, groove...
This paper presents the development of a numerical wave tank (NWT) using commercial Computational Fluid Dynamics (CFD) software, ANSYS Fluent 16.0. NWTs are widely used to analyse and optimise the performance of various wave energy converters, such as the Oscillating Water Column (OWC). A numerical modelling set-up is outlined which utilises Fluents Open Channel Wave Boundary Condition (OCWBC) along...
Pipeline networks being the most efficient mode of transportation in oil and gas industries, critically demand real time monitoring to assure its reliability. Currently employed manual leak detection methods in industries require a lot of manpower, resources and even obstruct the normal operation of the pipelines. In this study, we try to employ software based methods to detect and locate the position...
This paper deals with numerical investigation of a thermal convection during crystal growth in a vertical Bridgman cavity with varied heating and cooling temperatures and containing a low Prandtl number fluid. The transient Navier-Stokes equations coupled with heat and mass balances are solved numerically by using a finite-volume technique. The results obtained are given for 103 <Ra<105, Pr...
Polymerase Chain Reaction (PCR) is a biomedical technique for forensic laboratory sciences in which small amount of DNA is amplified through repeated thermal cycles. It has become a powerful technique for clinical, biological, medical, forensic and genetic analysis and other areas of life science. This process actively increases the quantity of DNA by repetition of three-step procedure i.e. denaturation,...
Sublimation based processing has proven to be an efficient method for manufacturing thin film CdS/CdTe PV devices. Recent advancements in computational simulation have opened a door for comprehensive modeling and analysis of the many processes involved in creating a fully functional solar cell. Computational models have been developed for CdS, CdTe, CdCl2, and CuCl that include fluid mechanics, heat...
In this paper, we present two-dimensional modeling and simulation of blood vessel using COMSOL Multiphysics. The rationale behind this study is that mathematical modeling and numerical simulation can lead to better understanding of the phenomena involved in vascular diseases. This study assumes that the fluid is laminar, non-Newtonian, viscous and compressible and the arterial wall is elastic. Parameters...
To meet the high cooling demand in the electronics industry, enhanced microchannel heat sinks were introduced. However, the intricacies and high costs associated with microfabrication technologies prove them unsuitable for application in conventional heat exchangers. Hence, the motivation to implement microscale passages in macro geometries ensues. In this study, the annular microchannel is formed...
Aiming at providing a theoretical basis for the 1000-MW giant fully air-cooled hydrogenerator, which is being studied and developed currently, this paper established a coupling calculation model of 3-D fluid and temperature field based on the actual structure and size of a 250-MW fully air-cooled fanless hydrogenerator. Fluid dynamics control equations, and corresponding boundary conditions in the...
Several biological effects have been reported for mechanical forces on individual cells including: signal transduction, gene expression, growth, and differentiation. In this paper, a novel model for studying the cell behavior under the effect of stresses is developed. A well-defined fluid flow passing over a single cell fixed inside a microchannel is considered in this model. By multi-scale modeling...
Breath training is an important part in the pronunciation recovery process, we simulate the fluent of air in the the upper respiratory tract, use computational fluid dynamic to build the impaired hearing children's pronunciation recovery system, and we have tasted the reliability of the system by experimental. We study the two parts in the breath process by the dynamic fluid computational method,...
The miner Anti-fire colloid preparation machine was designed referred to the principle of mixer designing in the chemical industry. The computational fluid dynamics (CFD) program FLUENT was used to simulate the inner flow of the colloid preparation machine which was filled with special fly ash slurry by the MRF method. Results of simulation showed the space of double-leaf arrangement had a significant...
In the process of air blower design, splitter blades could be adopted in the middle of rotator to improve the air blower performance. In order to understand the flow pattern in the high-pressure centrifugal blower of 9–26 type with splitter blade thoroughly, the three dimensional air flows in the air blower is numerically simulated and analyzed with computational fluid dynamics. Standard k-ε turbulence...
The flue gas that is emitted by vehicles in a tunnel accumulates and cause serious pollution. A vehicle emits a large amount of flue gas as it moves. In particular emitted gaseous carbon monoxide (CO), can influence the driver drives in a long tunnel without their knowledge, affecting the safety of driving. Additionally, when a driver drives in a long tunnel, the dark and monotonous surroundings can...
Flood wave dynamics simulations are determined by a robust and accurate Lagrangian block advection (LBA) scheme that can track the dry-and-wet interface and capture the shocks without using any slope limiter to control the numerical oscillations. Two series of challenging numerical problems are considered using the LBA. First, computations are carried out for water waves in a parabolic bowl. The wetting-and-drying...
With the increasing of the power from KW to MW for wind turbines, effective cooling measures are introduced for keeping the system operating within the allowable temperature. Taking a 1mw wind turbine as an example, this paper introduces the structural features and the ventilation way of it, the CFD(Computational Fluid Dynamics) software is adopted to analyze the fluid field and the temperature field...
In the circumstance of UG, By using UG/Open GRIP cycloidal rotor pump was developed, and the cycloida pump's rotor parametric design was realized. The 3D mode was built by inputting the parameters such as tooth number round radius, etc. The visualization and automation of design process were realized also. According to the model cycloidal pump fluid characteristics were analysed by using Pumplinx...
Ship fins stabilizer is a kind of anti rolling ship technique that could produce lift with initiative swing of fins at zero forward speed, and the lift could counteract the rolling forces of ocean waves. The method that fin stabilizer is used to anti rolling ship is different from the conventional theory of anti rolling ship at zero speed, so it's a kind of new theoretics. In order to study the process...
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