نتایج جستجو برای: bubble train
تعداد نتایج: 59617 فیلتر نتایج به سال:
Background: the most common painful and frequent invasive interventions in children’s hospital is venipuncture. The purpose of this study was to compare the two techniques of auditory distraction (Hear music) and mentally (bubble maker) in venipuncture induced pain in hospitalized children. Materials and methods: This clinical trial was done on all ill children hospitalized in 5 sections of 12 ...
purpose: to investigate the results of deep lamellar keratoplasty (dlk) by big bubble method with using shifting bubble sign in patients suffering from keratoconus or corneal opacity methods: in this prospective interventional clinical trial, 20 eyes of 18 patients (10 males and 8 females) who underwent dlk by big bubble method using shifting bubble sign were investigated. mean age of cases wer...
In present paper acombination of three-dimensional isothermal and two-dimensional non-isothermal Lattice Boltzmann Method have been used to simulate the motion of bubble and effect of wetting properties of the surface on bubble separation. By combining these models, three-dimensional model has been used in two-dimension for decreasing the computational cost. Firstly, it has been ensured that th...
In this paper, a CFD model of syngas flow in slurry bubble column was developed. The model is based on an Eulerian-Eulerian approach and includes three phases: slurry of solid particles suspended in paraffin oil and syngas bubbles. Numerical calculations carried out for catalyst particles, bubble coalescence and breakup included bubble-fluid drag force and interfacial area effects. Also, the ef...
Bubble columns are gas- liquid contactors that are widely used in chemical and bio- chemical industries. High mixing that result in high heat and mass transfer rates are amongst their advantages. Heat transfer in a bubble column having a bundle of heaters investigated and the variation of heat transfer coefficient with variation in heaters pitch to diameter ratios in a bundle of heaters reporte...
Stock market volatility is evaluated by measuring the variance of the market that is evaluated through consumption growth volatility in the framework of pricing of CCAPM models. This theory is not consistent with revealed facts, in reality; because consumption growth is very smooth but stock market appears highly volatile; this is famous to stock market volatility puzzle. In this regard, the ne...
People have long been fascinated by bubbles and foams dynamics, and since the pioneer work of Leonardo da Vinci in the early 16th century, this subject has generated a huge bibliography. However, only very recently, much interest was devoted to bubbles in champagne wines [1]. Small bubbles rising through the liquid, as well as a bubble ring (the so-called collar) at the periphery of a flute pou...
These articles discuss Earth's many dynamic processes and their interactions.
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