نتایج جستجو برای: gas superficial velocity

تعداد نتایج: 403499  

Journal: :Nucleation and Atmospheric Aerosols 2021

Gas solid fluidized bed application has gained popularity as an excellent contacting device that is been widely used in thermo-chemical processes, drying food processing industries etc. due to its favorable heat transfer characteristics. Most of the outmoded fluidization activities reported confined with columnar/cylindrical shaped reactors. Conventionally, tapered/conical reactors are for ener...

2010
Praveen Kumar Singh Kalachand Sain

Existence of gas-hydrates in the marine sediments elevates the velocity of seismic waves, whereas even a small amount of underlying free-gas decreases the seismic velocity considerably. These changes in velocities can be used for the assessment of gas-hydrates. The traveltime inversion is an effective method to derive a 2-D velocity structure from the seismic data. We have applied the method to...

Journal: :Processes 2021

Liquid loading in gas wells may slash production rates, shorten life, or even stop production. In order to reveal the mechanism of liquid and predict its critical flowrates, theoretical research laboratory experiments were conducted this work. A new model liquid-film reversal was established based on Newton’s law internal friction gas–liquid two-phase force balance, with reverse point obtained ...

Journal: :Industrial & Engineering Chemistry Research 2023

The conversion efficiency, operation, and design of bubbling fluidized bed (BFB) reactors depend on the dynamics behavior, which is significantly influenced by bubble properties. To establish best operating condition for efficient conversion, this study investigates behavior a BFB reactor using experimental measurements computational particle-fluid simulation. simulations account particle size ...

A new analytical study performed to investigate the effect of the temperature difference between gas and particle in propagation of the spherical flames. The combustible system is containing uniformly distributed volatile fuel particles in an oxidizing gas (Air) mixture. The model includes evaporation of volatile matter of dust particles to known gaseous fuel (methane) and the single-stage reac...

2013
Kun Xiao Changchun Zou Biao Xiang Jieqiong Liu

Gas hydrate model and free gas model are established, and two-phase theory (TPT) for numerical simulation of elastic wave velocity is adopted to investigate the unconsolidated deep-water sedimentary strata in Shenhu area, South China Sea. The relationships between compression wave (P wave) velocity and gas hydrate saturation, free gas saturation, and sediment porosity at site SH2 are studied, r...

Journal: :journal of chemical and petroleum engineering 2015
rahbar rahimi mozhgan movahedi parizi

sieve trays are widely used in the gas- liquid contactors such as distillation and absorption towers. in this article, a three-dimensional, two phase cfd model using euler-euler framework was developed to simulate a distillation tower with two sieve trays. hydrodynamic simulation of air and water system in different rates of gas phase was carried out and velocity distribution parameters, clear ...

Journal: :Rekayasa Mesin 2022

The aim of this study is to investigate the characteristics gas-non-Newtonian liquids flow patterns in square microchannels. microchannels that used was made by acrylic material with horizontal orientation and side length 8x10-4 m. Water, Air, Carboxymethyl Cellulose 0.2%wt (CMC 0.2%wt) aquoeus solution, Xanthan Gum (XG solution were as liquid test. Moreover, nitrogen gas superficial velocity v...

2017
W Yan J Economou

A 2D (axisymmetric) computational study of the discharge characteristics of an atmospheric pressure plasma jet as a function of gas flow rate was performed. The helium jet emerged from a dielectric tube, with an average gas flow velocity in the range 2.5–20 m s−1 (1 atm, 300 K) in a nitrogen ambient, and impinged on a substrate a short distance dowstream. The effect of the substrate conductivit...

2012
B Divya Bajoria Thangam Menon

Introduction Group A Streptococcus (GAS) causes diseases ranging from superficial skin & throat infections to severe lifethreatening diseases. Streptococcus invasive locus (sil) is a virulence gene responsible for pathogenesis of GAS. This study intends to detect the presence of sil gene among the non-invasive GAS and its association with toxin genes, erythromycin resistance genes, and emm types.

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