Hexagonal assemblies of wire wrapped fuel rods were analyzed experimentally at Texas A&M University. CFD analysis with LES and RANS (SST k-ω) a 61-pins experiment have already been published by using wall resolved meshing. These results are compared in this study to calculations functions, more precisely (k-ε) LES. The presented comparison will be used as reference result the design based model...

An neural network model of data mining is used to identify error sources in satellite-derived tropical sea surface temperature (SST) estimates from thermal infrared sensors onboard the Geostationary Operational Environmental Satellite (GOES). By using the Back Propagation Network (BPN) algorithm, it is found that air temperature, relative humidity, and wind speed variation are the major factors...

Abstract In this paper, to improve the combustion characteristics and working performance of solid fuel ramjet, a ramjet with gas generator is proposed. Based on k − ω SST Eddy-Dissipation equations, turbulent model established, internal flow field as well regression rate, species, were numerically analyzed. The results show that temperature rate increased. When airflow 0.4kg/s, increase will l...

In this work, the computational fluid dynamics technique is employed to study operating condition effects on optimum value of an important parameter called nozzle exit position (NXP) for ejector design. This uses gas R134a as working fluid. Numerical tests are carried out using a combination REFPROP 7.0 database state equation and high-Reynolds version SST k–ω model. Good agreement in terms ent...

• A benchmark experimental database for the transitional cavity flow is presented. RANS simulations were conducted using standard k-ω and SST turbulence models. main recirculation region two secondary vortices inside found. The separating does not reattach on bottom wall of cavity. forward-facing edge reattachment highly unsteady. yields more accurate predictions than k-ω. We present an flow. o...

A regional algorithm to estimate SST fields in the western North Pacific, where small oceanographic disturbance are often found, has been developed using Moderate Resolution Imaging Spectroradiometers (MODIS) aboard Terra and Aqua. Its associated algorithm, which includes cloud screening and SST estimation, is based on an algorithm for the Global Imager (GLI) aboard Advanced Earth Observing Sat...

In the present work are presented results from numerical simulations performed with the ANSYS-CFX code. It is studied a radial diffuser flow case, which is the main academic problem used to study the flow behavior on flat plate valves. The radial flow inside the diffuser has important behaviors such as the turbulence decay downstream and recirculation regions inside the valve flow channel due t...

In rat CA1 hippocampal pyramidal neurons (HPNs), somatostatin (SST) has inhibitory postsynaptic actions, including hyperpolarization of the membrane at rest and augmentation of the K+ M-current. However, the effects of SST on synaptic transmission in this brain region have not been well-characterized. Therefore we used intracellular voltage-clamp recordings in rat hippocampal slices to assess t...

Abstract The NACA4415 airfoil was numerically simulated with the help of Fluent software to analyze its aerodynamic characteristics. Results are acquired as follows: calculation accuracy is much higher than that XFOIL software; result SST k - ω (sstkw) turbulence model closest experimental value; within a certain range, larger Reynolds number is, lift coefficient and lift-to-drag ratio will be,...