The design of an aluminium melting furnace has faced two challenges: mathematical modelling and simulative optimization. This paper first uses fluid dynamics to model the process mathematically. Then, is utilized simulate a round shaped reverberatory for alloys. In order achieve highest thermal efficiency furnace, simulation are performed predict complex flow patterns, geometries, temperature p...

Simulations of bifurcated three-dimensional laminar forced convection in horizontal duct with plane symmetric sudden expansion are presented to illustrate the effects of flow bifurcations on temperature and heat transfer distributions. The stable bifurcated flow that develops in this symmetric geometry leads to non-symmetric temperature and heat transfer distributions in the transverse directio...

This paper describes the formulation and performance of a nonhydrostatic model featuring a unique variable stepped topography representation capable of capturing steep topographical slopes, while at the same time accurately representing subtle topography variations. The proposed enstrophy conserving formulation and the quasi-compressible closure cast on a multiply nested rotated spherical grid ...

Abstract The coils of radiant chambers tubular furnaces are operated under especially loaded conditions in terms temperature stress distribution. It is the sections that feed heated to required maximum temperatures. Also, part coil structure may be close proximity burners and exposed an open flame form superheating zones. In this regard, elements can deform prematurely collapse. One most import...

BACKGROUND Mood and anxiety disorders are highly prevalent and have a large impact on the lives of the affected individuals. Therefore, optimal treatment of these disorders is highly important. In this study we will examine the effectiveness of a stepped care program for primary care patients with mood and anxiety disorders. A stepped care program is characterized by different treatment steps t...

We are developing a new method using ultrasonic longitudinal and torsional vibration of a hollow-type stepped horn for hole machining. We foresee that the equipment can be simplified and miniaturized. In this paper, ultrasonic vibration sources of a hollow-type stepped horn without a diagonal slits vibration converter and with a diagonal slits vibration converter are used. The longitudinal and ...

T w o finishing trials were conducted to measure the response of cattle adjusting to high-concentrate diets to dietary monensin level. In trial 1, 54 individually fed Hereford-Angus steers (312 kg), previously fed a two-thirds corn silage: one-third corncob-based diet, were allotted in a 2 • 3 factorial arrangement of treatment with tylosin (0, 11 mg/kg) and monensin (0, 11, 33 mg/kg) fed durin...

recently the stepped spillways have been used as an appropriate solution for energy dissipation. in the present study, siahbisheh dam spillway is simulated by using computational fluid dynamic (cfd), in which the mixture method and reynolds stresses model (rsm) turbulence model is used. in the first modeling series the over all steppes slope is constant. the number of the steps is increased to ...

Air-water flow experiments were conducted on some flat and pooled stepped spillways with slopes of 8.9° and 26.6° in transition and skimming flows. The study comprised the observations of the flow patterns, characteristic air-water flow properties, and energy dissipation performances. The air-water flow properties showed some differences in terms of interfacial velocity, bubble count rate, and ...