نتایج جستجو برای: isothermal heat treatment

تعداد نتایج: 1586415  

Journal: :Isij International 2023

Fe-Cr-Co alloys are becoming important as a half-hard magnet for their novel applications, including non-contact electromagnetic brakes, because of the controllability its magnetic hardness depending on modulated structure formed by spinodal decomposition. However, experimental optimization complicated heat-treatment process to control microstructure significantly increases development cost, an...

Journal: :Physics of Fluids 2021

An analytical model for transport of rarefied non-isothermal gas in a cylinder with repulsive wall–gas interaction is developed, solving the stationary, collisionless Boltzmann equation. The results are compared to well-known ordinary Knudsen diffusion, and effect wall presented as correction factors results. Detailed physical interpretations given, showing how inhibits particle flow through cy...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی اصفهان - دانشکده مهندسی شیمی 1386

جذب و دفع نوع فرآیند جداسازی است که در موارد عملی زیادی مانند عملیات خشک کردن، واکنشهای کاتالیتیکی، تکنیکهای کروماتوگرافی تبادل یون بین محلول و جامد وعملیات تقطیر در صنعت به کار می رود. در مراحل جذب و دفع در بسترهای ثابت، موج غلظتی وجود دارد که بررسی دقیق آن، درجه جداسازی را نشان می دهد. منحنی های برون رفت، شکل موج غلظت را در جاذبها و دفع کننده ها به تصویر می کشند. شکل و پهنای این منحنی ها در ط...

2016

However, the temperature maps as provided by the method of Aschwanden et al. involve several strong assumptions. In particular, these temperature maps are assuming an isothermal plasma, which is a coarse approximation of what the true corona is; it certainly does not hold during flaring activity, and it is likely too to be incorrect too during transients, such as your heat fronts. In addition, ...

Journal: :Protein science : a publication of the Protein Society 1995
Y Liu J M Sturtevant

Isothermal calorimetric titration of 18-crown-6 ether with BaCl2 in pure aqueous solution over the temperature range 7-40 degrees C gives precise binding constants and enthalpy changes. Nonlinear least-squares fitting of the binding constants to the integrated van't Hoff equation, including a temperature-independent change in heat capacity, leads to van't Hoff enthalpies that differ significant...

2014
Imen Mejri Mohamed A. Abbassi

Abstract—A new algorithm based on the lattice Boltzmann method (LBM) is proposed as a potential solver for one-dimensional heat and mass transfer for isothermal carbonization of wood particles. To check the validity of this algorithm, the LBM results have been compared with the published data and a good agreement is obtained. Then, the model is used to study the effect of reactor temperature an...

1991
H H Willard L L Merritt J A Dean F A Settle

Purpose In this experiment you will examine the effect of temperature on retention in isothermal gas chromatography, and use this information to determine the heat of solution of the solute in the stationary phase and to determine the temperature for optimum retention. You will also examine the effect of flow rate on efficiency and construct a van Deemter plot, and determine the flow rate for o...

2012
Anthony Ablordey Diana Ackon Amissah Isaac Frimpong Aboagye Ben Hatano Toshio Yamazaki Tetsutaro Sata Koichi Ishikawa Harutaka Katano

BACKGROUND Buruli ulcer (BU) caused by Mycobacterium ulcerans (M. ulcerans) has emerged as an important public health problem in several rural communities in sub-Saharan Africa. Early diagnosis and prompt treatment are important in preventing disfiguring complications associated with late stages of the disease progression. Presently there is no simple and rapid test that is appropriate for earl...

2012
Jian-Jun Shu

This paper gives similarity transformations for laminar film condensation on a vertical flat plate with variable temperature distribution and finds analytical solutions for arbitrary Prandtl numbers and condensation rates. The work contrasts with Sparrow and Gregg’s assertion that wall temperature variation does not permit similarity solutions. To resolve the long debatable issue regarding heat...

2017
Ida Larsson

This thesis presents experimental work performed to develop a sensitive screening test procedure for biomass pellets, using isothermal calorimetry for direct measurement of the heat production rate. This method can be used to directly compare the reactivity, that is how prone the fuel is to self-heating, of different batches of biomass pellets. The results could be used for safety assessment by...

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