نتایج جستجو برای: rheological modelsrheology

تعداد نتایج: 11860  

Journal: :TheScientificWorldJournal 2003
David R Picout Simon B Ross-Murphy

Rheological techniques and methods have been employed for many decades in the characterization of polymers. Originally developed and used on synthetic polymers, rheology has then found much interest in the field of natural (bio) polymers. This review concentrates on introducing the fundamentals of rheology and on discussing the rheological aspects and properties of the two major classes of biop...

1999

The primary purpose of this chapter is to present an approach for developing nonparametric models for magneto-rheological (MR) dampers. Upon describing the approach adopted here, a non-parametric model for a commercial magneto-rheological damper is developed, and is compared with a parametric model from an earlier study. The results show that the proposed non-parametric model can more effective...

Journal: :The Journal of dairy research 2005
David Whyte Michael Walmsley Alvin Liew Rod Claycomb Graeme Mein

The rheological properties of the CMT gel were analysed. Data are presented to demonstrate that the gel is a non-homogenous, visco-elastic, non-Newtonian fluid with rheopectic, and rheodestructive behaviour. The fundamental chemistry of the CMT is reviewed and a modified theory of gel formation is presented. The implications of the rheological properties and modified theory of gel formation for...

2014
Xu Biao

Magnetorheological fluids have received widespread attention as smart materials due to their tunable properties. MRF consists of three key components including, soft magnetic particles, carrier liquids, and additives. This review details the characteristics, composition, and rheological principle of MRF, working principle of MRF devices, and their applications in other engineering arenas. The a...

2007
M. Grzesik P. Ptaszek A. Ptaszek

The aim of present study was to determine the viscoelastic properties of the model mixtures of the selected pasted polysaccharides. The initial material was maize starch (SK), mixed with guar gum (GG). Rheological tests were performed in time domain. Theoretical analysis covered adaptation of some achievements of phenomenological theory of viscoelasticity, which were applied during interpretati...

2004
GAMAL M. ABDEL-RAHMAN

In this paper, the unsteady flow of non-Newtonian fluid through a porous medium when an external magnetic field is applied is investigated. The non linear equation of motion is transformed to a similarity differential equation which is solved using the method of successive approximations. The rheological effects are shown and discussed on the velocity profile in terms of rheological parameter o...

Journal: :Journal of Biomechanical Engineering 1982

2012
G. M. Sayeed Ahmed Ravinder Reddy

An end milling process is widely used in fabrication of complex contours and shape parts at high spindle speeds. Many researchers try to investigate one of important aspect, which come across during machining is the self exited chatter vibration which causes severe damage of the tool and quality of the machined surface. The present work is focused on the Magneto-Rheological Damping effect on st...

2011
Valeria Alzari Daniele Nuvoli Sergio Scognamillo Massimo Piccinini Emilia Gioffredi Giulio Malucelli Salvatore Marceddu Mario Sechi Vanna Sanna Alberto Mariani

Frontal polymerization has been successfully used to synthesize poly(N-isopropylacrylamide) nanocomposite hydrogels containing graphene. The latter was directly achieved by ultrasound treatment of a dispersion of graphite inN-methylpyrrolidone. The dispersion, having the concentration of 2.21 g L , was characterized by TEM analysis and mixed with suitable amounts of N-isopropylacrylamide for th...

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