In order to predict the atomization characteristics of process zirconia dry granulation accurately, influence nozzle outlet diameter on is analyzed. The VOF method and RNG k-ε turbulence model are applied numerically analyze flow field pressure-swirl nozzles with different diameters granulation, effects spray cone angle, liquid film thickness, pressure distribution velocity result shows that wh...

Superheaters are essential components in a coal-fired power plant because they keep the highest tube wall temperature points radiant boiler. The pressurized steam flowing superheater tubes is heated via thermal radiation and convection from combustion gas. To prevent bursting of caused by fatigue for stable safe operation, precisely predicting complex heat transfer characteristics, estimating l...

the steger and warming flux vector splitting implicit scheme is used to numerically solve two dimensional reynolds averaged navier–stokes (rans) equations governing the vortex induced vibration of a flexible riser laterally supported by a spring and a damper. the k–ε model is used as turbulence model to simulate the turbulent flow in the wake of the riser. to update the new position of the rise...

in the present paper, a 3d numerical model has been applied to predict the flow hydrodynamics around power intakes within the dez dam reservoir. the dez dam is a 203 m high, double arch concrete dam which is constructed by italians in 1962. since then, sedimentation in reservoirhas continued and since the dam does not have bottom outlet, the reservoir bed level is raising by a rate of about 2.5...

Microsoft attempted to implement theWichmann–Hill RNG in Excel 2003 and failed; it did not just produce numbers between zero andunity, itwould also produce negative numbers. Microsoft issued a patch that allegedly fixed the problem so that the patched Excel 2003 and Excel 2007 now implement the Wichmann–Hill RNG, as least according to Microsoft. We show thatwhatever RNG it is thatMicrosoft has ...

A severe case of stenosis in coronary arteries results in turbulence in the blood flow which may lead to the formation or progression of atherosclerosis. This study investigated the turbulent blood flow in a coronary artery with rigid walls, as well as 80% single and double stenoses on blood flow. A finite element-based software package, ADINA 8.8, was employed to model the blood flow. The hemo...

Numerical simulations of the flow surrounding particle agglomerates were carried out using computational fluid dynamics to assess ability five RANS turbulence models estimate drag coefficient in agglomerates. Simulations steady conditions for Reynolds numbers between 1 and 1500. Streamlines showed that symmetrical present a velocity profile similar single sphere profile. Results both Spalart-Al...

ABSTRCT: Use CFD method to study of the air distribution of certain practical project. By using three-dimensional RNG k-εturbulent model, the air distribution of an underground main workshop in hydropower station with heat source at non-isothermal condition has been designed by means of numerical simulation. Solve the controlling equations by using the soft ware of computational fluid dynamics ...

Fast and accurate simulation of the outdoor airflow distribution is important for studying urban microclimate. In this paper, two pressure-correction schemes (i.e., NIPC NSPF) solving N-S equation item by are implemented in OpenFOAM their differences from PISO algorithm simulating around a single 1:1:2 bluff body analyzed. The RNG k-ε turbulence model chosen to study disturbance, while second-o...