Objectives 1. To identify organisations involved in gas explosion research in the U.K. and Europe. 2. To survey these organisations, to determine their areas of current and proposed work. 3. To collate their responses in a report, which also provides an up to date literature review of gas explosion modelling. 4. To critically assess the strengths and weaknesses of available gas explosion models...

Wind catchers are traditional natural ventilation systems attached to buildings in order to ventilate the indoor air. The most common type of wind catcher is four sided one which is capable to catch wind in all directions. CFD simulation is the perfect way to evaluate the wind catcher performance. The accuracy of CFD results is the issue of concern, so sensitivity analyses is crucial to find ou...

The paper presents Design development of cement industry cyclone based on CFD along with pilot plant trials. Based on simulation of laboratory scale cyclone as expressed in literature and in-house pilot plant experiments, Reynolds stress model has been found to predict the turbulent flow field, pressure drop and particle collection efficiency closely as compared to other standard turbulence mod...

Traditional Text-Dependent Speaker Recognition (TDSR) systems model the user-specific spoken passwords with frame-based features such as MFCC and use DTW or HMM type classifiers to handle the variable length of the feature vector sequence. In this paper, we explore a direct modeling of the entire spoken password by a fixed-dimension vector called Compressed Feature Dynamics or CFD. Instead of t...

1. Abstract Nowadays, the use of computational fluid dynamics (CFD) in the design of valves is very common. Despite the continuing growth of computing capability, the computational cost of complex three-dimensional CFD analysis of butterfly valve maintains high, therefore, the CFD analysis-based optimization becomes more time-consuming and computational expensive. In this paper, a comparative s...

As the capabilities of computational fluid dynamics (CFD) to model full aircraft config­ urations improve, and the speeds of massively parallel machines increase, it is expected that CFD simulations will be used more and more to steer or in some cases even replace traditional flight test analyses. The mission of the US Air Force SEEK EAGLE office is to clear any new weapon con­ figurations and ...

1.0 ABSTRACT Dynamic data visualization in real-time involves rapid simulations of computerized models. Although computing power has increased exponentially in the last few decades, detailed simulations using software introduce time-delay that defeat the notion of realtime data visualization of the generated results. Approximate techniques can pave way for efficient generation of continuous flo...

Recent advances in computational fluid dynamics (CFD) codes along with high performance computing hardware made the codes more useful in many engineering applications. For instance, single-phase CFD codes have long been used to predict the fluid flow in fuel channels of a pressurized water reactor (PWR) [1, 2]. Considering the current affordable number of computation mesh is a little below one ...

As part of the reactor dynamics activities of FZK/IRS, the qualification of a detailed 3D CFD model of a reactor pressure vessel is a key step in safety evaluations for improving predictive capabilities and acceptability of commercial CFD tools in reactor physics. The VVER-1000 Coolant Transient Benchmark, initiated by OECD, represents an excellent opportunity for validation. In this work a CFD...

This paper reviews some of our recent applications of computational fluid dynamics (CFD) to model heat and mass transfer problems in neonatology and investigates the major heat and mass transfer mechanisms taking place in medical devices such as incubators and oxygen hoods. This includes novel mathematical developments giving rise to a supplementary model, entitled infant heat balance module, w...