نتایج جستجو برای: experimental two phase fluid flow
تعداد نتایج: 3864094 فیلتر نتایج به سال:
Subcooled flow boiling in multi-microchannels can be used as an efficient thermal management approach in compact electrical devices. Highly subcooled flow boiling of HFE 7100 is studied in two microchannel heat sinks to choose a proper numerical model for simulating boiling flows in microchannels. Results of five different numerical models, including Volume of Fluid (VOF), Eulerian boiling, Eul...
most specialists in the field of foreign language teachingconsiderreading skill as an interactive process between the reader’s prior knowledge and the text.accordingly, the activation of prior knowledge for an effective comprehension is very important. it is generally agreed that the pre-reading phase is the stage where this type of interaction and activation may be enhanced throughcertain stra...
multiphase flows are commonly encountered in oil and gas industries. the transport of multiphase flow causes the formation of slug, the increase of pressure drop and the possibility of phase changes therefore, a set of simulation runs was performed to predict flow regimes in a horizontal pipeline, and the results were compared with the baker chart. the effects of small downward inclinations of ...
In this paper, symmetric water entry of twin wedges is investigated for deadrise angle of 30 degree. Three numerical simulation of a symmetric impact, considering rigid body dynamic equations of motion in two-phase flow is presented. The two-phase flow around the wedges is solved by Finite Element based on Finite Volume method (FEM-FVM) which is used in conjunction with Volume of Fluid (VOF) sc...
اثر برخورد بین ذرات جامد در جریانهای گاز – جامد در بسیاری از موارد حتی در نسبت بارهای پایین قابل چشم¬پوشی نیست. در این پایان¬نامه برای شناخت و بررسی تاثیر و اهمیت برخورد ذرات, یک جریان مغشوش گاز- جامد رو به بالا در یک لوله عمودی با شار ثابت به روش چهارطرفه اویلرین- لاگرانژین شبیه سازی شده است. در این الگو علاوه بر در نظر گرفتن تاثیر دوفاز گاز- جامد روی هم در تبادل مومنتوم, انرژی, شدت توربولانس ...
In this research, effect of nanoparticles dimeter on free convection of aluminum oxide-water was investigated in a cavity by single phase and two phase models. The range of Rayleigh number is considered 105-107 in volume fractions of 0.01 to 0.03 for nanoparticles with various diameters (25, 33, 50 and 100 nm). Given that the two phase nature of nanofluids, necessity of modeling by this method ...
جریان دو فازی مایع –ذره در بسیاری از صنایع مانند صنایع نفت و پتروشمیایی رخ می دهد. در این پایان نامه پس از ساخت کانالی مستطیلی که جنس دیواره های آن از ورق پلکسی گلاس شفاف می باشد، جریان آشفته دو فازی آب-ذره مورد بررسی قرار گرفت. برای بررسی مولفه های اغتشاشی جریان از روش اندازه گیری به کمک لیزر (lda) استفاده کردیم. به این صورت که مولفه های اغتشاشی سرعت در راستای جریان و همچنین مولفه های اغتشاشی ...
abstract this study examines the effect of teaching lexical inferencing strategies on developing reading comprehension skill of iranian advanced efl learners. participants were female students of meraj and shokouh institudes of garmsar a quasi-experimental design using two intact advanced classes of efl students at meraj and shokouh institutes. as the first step, a general toefl proficiency te...
In this paper, numerical investigation of upward two phase flow of air-water has been studied. Different conditions of flow regimes including annular, wispy annular, slug, churn and bubbly are simulated based on Hewitt and Roberts map, and a good agreement between the experimental data of the map and the numerical simulation has been observed. Accordingly, a proper CFD model in CFD software of ...
Gas-lift pumps are devices for lifting liquid phase incorporating the gas phase to be injected in the bottom of liquid column. They are widely used in various industrial applications such as oil extracting in petroleum industries. Gas-liquid flow being the main part of the flow through these systems, flowing in vertical pipes of gas-lift pumps has different regimes namely bubbly, slug, chur...
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