نتایج جستجو برای: buoyancy parameter
تعداد نتایج: 219576 فیلتر نتایج به سال:
The unsteady flow and heat transfer in an incompressible laminar, electrically conducting and non-Newtonian fluid over a non-isothermal stretching sheet with the variation in the viscosity and thermal conductivity in a porous medium by the influence of an external transverse magnetic field have been obtained and studied numerically. By using similarity analysis the governing differential equati...
This study set out to examine the relationship between family atmosphere, school value and academic buoyancy mediated by perceived self-efficacy among a group of junior high school students. The present study had a correlational design. The statistical population of the study included all junior high school students in Marvdasht in 2018-19 school year. The participants were 356 students who wer...
Rayleigh-Bénard convection in rotating spherical shells can be considered as a simplified analogue of many astrophysical and geophysical fluid flows. Here, we use threedimensional direct numerical simulations to study this physical process. We construct a dataset of more than 200 numerical models that cover a broad parameter range with Ekman numbers spanning 3 × 10−7 ≤ E ≤ 10−1, Rayleigh number...
In turbulent mixed convection conditions, flow and heat transfer can deteriorate under specific thus affecting the performance of safety system, which could imperil nuclear reactor. this paper, by analyzing velocity, temperature distributions, other thermal-hydraulic parameters, steady-state computational fluid dynamics approach with SST k–? turbulence model used in study was verified. Then, ch...
Introduction and purpose: Students’ perceptions of the learning environment play a vital role in the process of education, buoyancy, and academic performance. This study aimed to investigate the capability of explaining the academic buoyancy and academic performance of health students of Semnan University of Medical Sciences, Semnan, Iran, based on their perception of learning environment. Met...
INTRODUCTION Accidental immersion in cold water is an occupational risk. Work suits and life jackets (LJ) should work effectively in combination to keep the airway clear of the water (freeboard) and enable self-righting. We hypothesized that inherent buoyancy, in the suit or LJ, would be beneficial for enabling freeboard, but its distribution may influence LJ self-righting. METHODS Six partic...
Efficient locomotion between prey resources at depth and oxygen at the surface is crucial for breath-hold divers to maximize time spent in the foraging layer, and thereby net energy intake rates. The body density of divers, which changes with body condition, determines the apparent weight (buoyancy) of divers, which may affect round-trip cost-of-transport (COT) between the surface and depth. We...
The present study aimed to investigate the relationship between hope and academic self-efficacy, on the one hand, and academic buoyancy, on the other hand, considering the mediating role of happiness among high school students. The study was descriptive with a correlational design. The statistical population included all senior high school students in Kashan, Iran, in the 2016 academic year. Us...
6.11 Buoyancy and Its Regulation ....................................... 176 6.11.1 Gas Vacuole Structure ..................................................... 176 6.11.2 Pressures Acting on Gas Vesicles .................................... 176 6.11.3 Buoyancy Regulation ...................................................... 177 6.11.4 Sinking or Floating ..........................................
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