نتایج جستجو برای: thermal and mechanicalparameters

تعداد نتایج: 16874165  

This artcile is concerned with thermal buckling and thermal induced free vibration analyses of PCPs (perforated composite plates) with simply supported edges applying a mathematical model. The stiffness and density of PCP are defined locally using Heaviside distribution functions. The governing equations are derived based on CLPT. The present solution gives reasonable results in comparison with...

Journal: :فیزیک زمین و فضا 0
مهدی علی پور کله بستی کارشناس ارشد مخازن شرکت ملی نفت ایران، برنامه ریزی تلفیقی، منابع هیدروکربوری، تهران، ایران بهمن بهلولی دانشیار، دانشکده زمین شناسی، پردیس علوم دانشگاه تهران، ایران

productivity of an oil well is an important parameter in any oil field development. low production rate of the wells, impose more production wells drilling which directly jeopardizes the economical feasibility of the project. oil production rate in some of the wells is very low due to low permeability of the reservoir rock. several practice like hydraulic fracturing and acid fracturing is very ...

Journal: :nutrition and food sciences research 0
nazanin amirasgari department of food science and technology, science and research branch, islamic azad university, mazandaran, iran. hossein mirsaeedghazi department of food technology, college of abouraihan, university of tehran, pakdasht, iran.

background and objectives: red beet extract concentrate can be used as a natural colorant in food products; however, destructive effects of thermal methods to produce juice concentrate decrease nutritional value in the final product. materials and methods: in this study, red beet extract was concentrated using osmotic distillation method, and the best pretreatment was evaluated to increase the ...

ژورنال: انرژی ایران 2018

Article 19 of the national building regulations is one of the important strategies of modern Iranian architecture, which can help to calculate and determine building materials in a warm and dry climate for thermal comfort. In order to discover the effect of this topic on thermal comfort. In this study, through the quantitative method and PMV, the effect of nineteenth building on winter temperat...

As s‌tudents spend one-third of their time at school, their health, comfort, and productivity are mos‌tly influenced by thermal condition and indoor air quality of classrooms. Regarding that manual window-opening is a common way for providing fresh air in classes and s‌tudents aren't allowed to change their uniform, position or control the windows during the lesson hours, providing thermal comf...

Journal: :The Review of scientific instruments 2013
Jun Liu Jie Zhu Miao Tian Xiaokun Gu Aaron Schmidt Ronggui Yang

The increasing interest in the extraordinary thermal properties of nanostructures has led to the development of various measurement techniques. Transient thermoreflectance method has emerged as a reliable measurement technique for thermal conductivity of thin films. In this method, the determination of thermal conductivity usually relies much on the accuracy of heat capacity input. For new nano...

Journal: :international journal of nano dimension 0
f. alfeel department of physics, science faculty, damascus university, syria. f. awad department of physics, science faculty, damascus university, syria. f. qamar department of physics, science faculty, damascus university, syria.

mirage effect is contactless and non destructive method which has been used a lot to determine thermal properties of different  kind of samples , transverse photothermal deflection ptd in  skimming configuration with ccd camera  and special programs is used to determine thermal conductivity of porous silicon ps  film. ps samples were prepared by electrochemical etching. thermal conductivity wit...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه زنجان - دانشکده علوم پایه 1390

در حال حاضر رنگدانه های گروه آزو یکی از بزرگترین گروه رنگدانه های مصرفی در صنعت نساجی هستند. روش هایی که برای تصفی? فاضلاب ها مورد استفاده قرار می گیرند، همانند سیستم-های تصفی? اولیه و ثانویه، در حذف رنگدانه ها و معرف ها ناموفق عمل می نمایند. برای مثال فرآیندهای جذب و انعقاد مواد شیمیایی دو روش بکار رفته در تصفیه فاضلاب هستند. اما این روش ها صرفاً رنگدانه ها را از فاز مایع به فاز جامد انتقال می ...

M. Kalantar and G. Fantozzi,

Dense Silicon nitride was investigated to determine the effect of its microstructural parameters and densification on thermo-mechanical properties and thermal stress resistance to fracture initiation during a hot or cold mechanical and thermal shock testing. The different materials and microstructures were obtained by changing the parameters such as the type of the powder, additive, forming p...

A. Maghsoudipour H. Tamaddon

In this work, the strontium-doped lanthanum manganite- a ceramic material- used as cathode in solid oxide fuel cells. An impression of grinding time on the structural and thermal properties of Sr-doped LaMnO3 system with La1-xSrxMnO3 (x=0.2) stoichiometric ratio was investigated. The nano crystallite LSM powder with cubic structure was prepared by varying the milling time of planetary monomill ...

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