The study of the effect of concentration of the agar-agar solution on the Rheological and thermo rheological behaviour

Proceedings of The 2nd International Conference on Research in Applied Science Pub Date : 2019-10-30 DOI:10.33422/2nd.rasconf.2019.09.594

N. Sahraoui, H. Abchiche

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引用次数: 2

Abstract

: The purpose of this work is to study the parameters that influe the rheological behavior of a complex fluid (agar agar solution), on a capillary remoter., the rheological properties of agar solution were studied, in particular the concentration's effect (0,1%, 0,15%, 0,17%, 0,2%), and temperature (20°C, 30°C, 40°C, 50°C, 60°C, 70 °C) on the rheological behavior of the agar solution. A comparative study of various rheological laws (Herschel-Buckley, Cross, Oswald De Waele, Bingham) was made, to establish a model that presents the rheological behavior which applies to different samples of agar solution, based on the coefficient of correlation. Results indicated that the rheological behavior of agar solution depends on the range of shear rate used: for low shear rate (lower than 6.2 s -1 ) the solution of agar can be modeled by an Ostwald-De Waele-type power-law, but for the high shear rate (higher than 6.2 s -1 ) the solution of agar can be described by Bingham's model. The concentration's and temperature's effect of agar solution on the two models studies’ parameters (Ostwald-De Waele, Bingham) was studied.

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琼脂溶液浓度对其流变学和热流变行为影响的研究

本工作的目的是研究影响复杂流体(琼脂溶液)流变行为的参数，在毛细管遥控器上。，研究了琼脂溶液的流变特性，特别是浓度(0.1%，0,15%，0,17%，0,2%)和温度(20°C, 30°C, 40°C, 50°C, 60°C, 70°C)对琼脂溶液流变行为的影响。对各种流变规律(Herschel-Buckley, Cross, Oswald De Waele, Bingham)进行了比较研究，建立了一个基于相关系数的模型，该模型描述了适用于不同琼脂溶液样品的流变行为。结果表明，琼脂溶液的流变行为取决于所使用的剪切速率范围:对于低剪切速率(低于6.2 s -1)，琼脂溶液可以用Ostwald-De wale型幂律模型来描述，但对于高剪切速率(高于6.2 s -1)，琼脂溶液可以用Bingham模型来描述。研究了琼脂溶液的浓度和温度对两种模型(Ostwald-De Waele, Bingham)参数的影响。

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Proceedings of The 2nd International Conference on Research in Applied Science

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