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Showing 2 results for Peyghambarzadeh


Volume 10, Issue 37 (Spring 2017)
Abstract

This essay denotes the context for observation of cultural behavior of the sixth decade according to cultural formation and discourse analysis of this decade, those groups into the same historical era who have the same experience from the particular social occurrence - the WAR and holy defense. In this analysis of generation dependencies, theories, judgments and common values are studied about stable phenomenon, common meanings which is in the field of experience from the hidden generation, and transfer in this decade narrative stories. In this present essay to understand the interrelation of generations for narrative authors, we assist two terms: 1. the qualification that bring social sources and areas for this changes, and 2- the qualifications that come to form the content and ideological setting, and shows that traditional revolutionary ideological discourse creates a vast array of new ideas through the production processes, selection, and institutionalization which in significant way deployed the ideology of official and cultural deep-seated institutions. This discourse is a function of cultural formulations of sixth decade that is created in order to the crisis in moral system, resources mobilization, and the formation of chains of interaction among the cultural elites. In this cultural context, narrative authors advocated dominant discourse with their new ideas and provoked the answers of the other actors in the present social environment. The Cycle of “idea- answer- idea” is one of the methods and mechanisms of action that acts through the chains of action with formation of repeated dominant discourse. In this way, social experiences of the authors in this period, are as same as the ideological elements with positive and negative elements were recorded and written.
Mohammad Salimi, Seyed Mohsen Peyghambarzadeh, Seyed Hasan Hashemabadi, Alireza Chabi,
Volume 15, Issue 2 (4-2015)
Abstract

In this study, the forced convective heat transfer of pure water and alumina-water nanofluid with volume concentration of 0.5% and 1%, as a cooling fluid through a microchannel heat exchanger was experimentally investigated. This microchannel consists of 17 parallel channels with a rectangular cross section with 400 µm width, 560 µm height and 50 mm length. The experiments were performed in the range 600 to 1800 of Reynolds and constant heat flux conditions (19 W/cm2). Stability studies showed that alumina-water nanofluid at pH = 3 for 3 hours in a bath of the ultrasonic vibrating demonstrate the maximum stability. The variations of microchannel surface temperature, fluid temperature at the entrance region of the microchannel, average heat transfer coefficient of nanofluid and pure water, and their friction factor measured experimentally. Also comparison between average Nusselt number with existing heat transfer relationships was performed. The results show that heat transfer using nanofluid shows considerably increase in comparison to water. So that the maximum amount of average heat transfer coefficient for alumina-water nanofluid with 0.5% concentrations is about 32.8% and for alumina-water nanofluid with 1% concentrations about 49.7% in comparison to pure water. It was also found that the heat transfer coefficient increases with increasing Reynolds number and nanoparticle volume fraction.

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