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	Tokové chování kapaliny Vočadlova typu v případě zpětné extruse Filip, Petr ; David, Jiří ; Pivokonský, Radek The aim of this contribution is to present semi-analytical form describing a velocity profile for Vočadlo-type fluids including a location of the plug flow region in an annular passage. Detailed record
	Vztah viskozita vs. rychlost smykové deformace v procesu stárnutí emulsí Filip, Petr ; David, Jiří ; Pivokonský, Radek The aim of this contribution is to present an empirical model taking into account ageing of highly concentrated emulsions. This model enables smooth passage from modelling of viscoelastic fluid (shear-thinning behaviour)corresponding to a "fresh" material to a description of viscoplastic fluid (viscoplastic behaviour) corresponding to an "aged" material including yield stress modelling. Detailed record
	Non-Newtonian liquids : determination of a value of viscosity characterising the initial newtonian plateau David, Jiří ; Filip, Petr The present contribution indicates that precisely the same situation - as with the determination of the so-called yield stress of viscoplastic materials - concerns also the value of viscosity describing the initial Newtonian plateau. It is shown that the determination of this value from the experimental data is not unique, significantly subjects to the range of measured parameters, and the proper determination of the precise value is very questionable. Detailed record
	On non-monotonous behaviour of shear-viscosity function David, Jiří ; Filip, Petr The aim of this contribution is to propose a new phenomenological model enabling description of non-monotonicity of shear-viscosity function for rheologically complex fluids. The applicability of this model is discussed with the emphasis on the number of model parameters and experimentally examined. Detailed record
	Critical shear values of extruded polymer blends Filip, Petr ; David, Jiří ; Keyzlarová, L. ; Sáha, P. The onset of flow instabilities (encountered during extrusion of polymer melts) corresponds to the flow conditions when the critical shear stresses or the critical shear rates are attained. These critical values were experimentally determined for two cases of polymer blends. Consequently there were used the mixture rules of a logarithmic type for desciption of behaviour of critical shear values. Detailed record
	Behaviour of fluids obeying Robertson-Stiff model in concentric annuli Filip, Petr ; David, Jiří Relations between volumetric flow rate and pressure gradient exerted in the axial direction are derived for laminar axial flow through the concentric annulus with the inner cylinder moving along its axis. It is supposed that non-Newtonian fluids obey Robertson-Stiff model. Detailed record
	Couette-Poiseuille flow of viscoplastic fluids in annuli Filip, Petr ; David, Jiří Detailed record
	Určování nestabilit povrchu vytlačovaných polymerních tavenin David, Jiří ; Filip, Petr ; Sáha, P. Detailed record
	Application of mixture rules for determination of critical shear values of extruded lPE/bPE blends David, Jiří ; Filip, Petr ; Sáha, P. Detailed record
	Qualitative Characteristics of a Relation Flow Rate vs Pressure Drop for Power-Law Fluids in Capillary Dies David, Jiří ; Filip, Petr Detailed record

See also: similar author names
3	DAVID, Jaroslav
7	DAVID, Josef
9	David, Jakub
22	David, Jan
3	David, Jaroslav
7	David, Josef

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