Results 31 to 40 of about 7,078,044 (312)

Melting of non-Newtonian phase change material in a finned triple-tube: Efficacy of non-uniform magnetic field

open access: yesCase Studies in Thermal Engineering, 2021
In this paper, a numerical study is presented on the melting process and heat transfer enhancement of a non-Newtonian phase change material (NPCM) in a double tube and a finned triple tube.
Somayeh Davoodabadi Farahani   +3 more
doaj   +1 more source

The thinning of lamellae in surfactant-free foams with non-Newtonian liquid phase [PDF]

open access: yes, 2008
Thinning rates of liquid lamellae in surfactant-free non-Newtonian gas–liquid foams, appropriate for ceramic or polymer melts and also in metals near the melting point, are derived in two dimensions by matched asymptotic analysis valid at small capillary
Roper, S.M.   +3 more
core   +1 more source

Stress Overshoot Analysis in Flow Start-Up Tests: Aging Time Fitting of the Different Gel-Based Drilling Fluids

open access: yesGels
Drilling fluids are essential for maintaining cutting suspension during drilling, exhibiting gel-like behavior at rest and liquid-like behavior under shearing. These fluids display shear-thinning behavior, yield stress, and thixotropy.
Luis H. Quitian-Ardila   +6 more
doaj   +1 more source

Rheological Characterization of Non-Newtonian Mixtures by Pressure Pipe Tests [PDF]

open access: yes, 2021
The rheological behavior of non-Newtonian fluids in turbulent conditions is an important topic in several fields of engineering. Nevertheless, this topic was not deeply investigated in the past due to the complexity of the experimental tests for the ...
Riccardo Martino   +3 more
core   +1 more source

Natural convection of viscoplastic fluids in side-heated open cavities

open access: yesCase Studies in Thermal Engineering
This study considers the natural convection process of viscoplastic fluid in a side-open cavity filled with conductive solid blocks, which are uniformly distributed and form a square lattice.
Paulo R.M. Santos   +3 more
doaj   +1 more source

Flow of Non-Newtonian Fluids

open access: yesNihon Reoroji Gakkaishi(Journal of the Society of Rheology, Japan), 1982
The present paper summarizes various problems on non-Newtonian fluid mechanics. Due to complex rheological behaviors of non-Newtonian fluids, constitutive equations have highly nonlinear character. As two approaches to obtain constitutive equations, continuum mechanics and molecular theory are described, and then a number of models are presented ...
openaire   +4 more sources

Generation of Newtonian droplets in Newtonian and non-Newtonian carrier flows in micro T-junctions under opposed-flow configuration [PDF]

open access: yes, 2020
In this paper the generation of Newtonian microdroplets in both Newtonian and non-Newtonian carrier fluids through a commercial micro T-junction under an opposed-flow configuration is analyzed experimentally.
Morini G. L., Rostami B.
core   +1 more source

Numerical investigation of viscoplastic fluids on natural convection in open cavities with solid obstacles

open access: yesHeliyon
This study investigates the natural convection process within open cavities filled with viscoplastic fluid following the Bingham model with solid square conductive blocks uniformly distributed throughout the cavity.
Paulo R.M. Santos   +2 more
doaj   +1 more source

Deformation of a non-newtonian ellipsoidal drop in a non-newtonian matrix: extension of Maffettone–Minale model [PDF]

open access: yes, 2004
A phenomenological model for the dynamics of a buoyancy free non-Newtonian drop immersed in a non-Newtonian fluid subjected to a flow field with an arbitrary uniform velocity gradient is presented.
MINALE, Mario
core   +1 more source

Lattice Boltzmann simulations of unsteady Bingham fluid flows

open access: yesApplications in Engineering Science
Transient flows of viscoplastic fluids have very peculiar characteristics. The startup and cessation flows of viscoplastic materials have been subject to many theoretical and numerical investigations. The most challenging aspect of numerical solutions of
Alan Lugarini   +2 more
doaj   +1 more source

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