Buoyancy-driven convection of MWCNT – Casson nanofluid in a wavy enclosure with a circular barrier and parallel hot/cold fins

The induced magnetic field for three-dimensional bio-convective flow of Casson nanofluid containing gyrotactic microorganisms along a vertical stretching sheet is investigated. The movement of these microorganisms cause bioconvection and they act as bio-active mixers that help in stabilising the nanoparticles in the suspension. The two forces, Thermophoresis and Brownian motion are incorporated in the Mathematical model along with Stefan blowing. The resulting model is transformed to ordinary differential equations using similarity transformations and are solved using [Formula: see text] method. The Velocity, Induced Magnetic field, Temperature, Concentration of Nanoparticles, and Motile density profiles are interpreted graphically. It is observed that the Casson parameter decreases the flow velocity and enhances the temperature, concentration, and motile density profiles and also it is noticed that the blowing enhances the nanofluid profiles whereas, suction diminishes the nanofluid profiles. On the other hand, it is perceived that the rate of heat conduction is enhanced with Thermophoresis and Brownian motion.

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A multi-site, year-round turbulence microstructure atlas for the deep perialpine Lake Garda

Scientific Data ◽

10.1038/s41597-021-00965-0 ◽

2021 ◽

Vol 8 (1) ◽

Author(s):

Sebastiano Piccolroaz ◽

Bieito Fernández-Castro ◽

Marco Toffolon ◽

Henk A. Dijkstra

Keyword(s):

Turbulent Mixing ◽

Meteorological Data ◽

Time Of Day ◽

Monthly Basis ◽

Lake Garda ◽

Standardized Protocol ◽

Wide Range ◽

Buoyancy Driven Convection ◽

Monitoring Activity ◽

Additional Monitoring

AbstractA multi-site, year-round dataset comprising a total of 606 high-resolution turbulence microstructure profiles of shear and temperature gradient in the upper 100 m depth is made available for Lake Garda (Italy). Concurrent meteorological data were measured from the fieldwork boat at the location of the turbulence measurements. During the fieldwork campaign (March 2017-June 2018), four different sites were sampled on a monthly basis, following a standardized protocol in terms of time-of-day and locations of the measurements. Additional monitoring activity included a 24-h campaign and sampling at other sites. Turbulence quantities were estimated, quality-checked, and merged with water quality and meteorological data to produce a unique turbulence atlas for a lake. The dataset is open to a wide range of possible applications, including research on the variability of turbulent mixing across seasons and sites (demersal vs pelagic zones) and driven by different factors (lake-valley breezes vs buoyancy-driven convection), validation of hydrodynamic lake models, as well as technical studies on the use of shear and temperature microstructure sensors.

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Effects of Buoyancy-Driven Convection on Nucleation and Growth of Protein Crystals

Annals of the New York Academy of Sciences ◽

10.1196/annals.1324.001 ◽

2004 ◽

Vol 1027 (1) ◽

pp. 1-9 ◽

Cited By ~ 4

Author(s):

CHRISTO N. NANEV ◽

ANITA PENKOVA ◽

NAOMI CHAYEN

Keyword(s):

Nucleation And Growth ◽

Protein Crystals ◽

Buoyancy Driven Convection

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The Influence of Gravity on Eutectic PbSn Alloy Grown by the Vertical Bridgman Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.869.637 ◽

2016 ◽

Vol 869 ◽

pp. 637-642

Author(s):

Rafael Cardoso Toledo ◽

Chen Y. An ◽

Irajá Newton Bandeira ◽

Filipe Estevão de Freitas

Keyword(s):

Eutectic Alloy ◽

Thermal Gradient ◽

Bridgman Method ◽

Vertical Bridgman Method ◽

Vertical Bridgman ◽

Composition Profiles ◽

Buoyancy Driven Convection ◽

Gravity Acceleration

Composition profiles of eutectic alloy Pb25.9Sn74.1 atomic % grown by the normal and inverted Bridgman methods are presented and the study of the solute alloy redistribution is made. The inverted vertical Bridgman method, where the solidification occurs from the top to the bottom of the melt under a destabilizing thermal gradient, allows the growth of crystals with buoyancy-driven convection different from that with the usual vertical Bridgman configuration. The scope of this work is to study the influence of the gravity acceleration in the convection process.

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Supercritical cell size for buoyancy-driven convection

The Chemical Engineering Journal ◽

10.1016/0300-9467(82)85026-0 ◽

1982 ◽

Vol 25 (1) ◽

pp. 101-105

Author(s):

J.S. Vrentas ◽

C.M. Vrentas ◽

R. Narayanan ◽

S.S. Agrawal

Keyword(s):

Cell Size ◽

Buoyancy Driven Convection

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A generalized perspective of Fourier and Fick’s laws: Magnetized effects of Cattaneo-Christov models on transient nanofluid flow between two parallel plates with Brownian motion and thermophoresis

Nonlinear Engineering ◽

10.1515/nleng-2020-0009 ◽

2020 ◽

Vol 9 (1) ◽

pp. 201-222 ◽

Cited By ~ 1

Author(s):

Usha Shankar ◽

Neminath B. Naduvinamani ◽

Hussain Basha

Keyword(s):

Brownian Motion ◽

Joule Heating ◽

Concentration Field ◽

Double Diffusion ◽

Diffusion Models ◽

Time Dependent ◽

Parallel Plates ◽

Nanofluid Flow ◽

Casson Nanofluid ◽

Highly Nonlinear

AbstractPresent research article reports the magnetized impacts of Cattaneo-Christov double diffusion models on heat and mass transfer behaviour of viscous incompressible, time-dependent, two-dimensional Casson nanofluid flow through the channel with Joule heating and viscous dissipation effects numerically. The classical transport models such as Fourier and Fick’s laws of heat and mass diffusions are generalized in terms of Cattaneo-Christov double diffusion models by accounting the thermal and concentration relaxation times. The present physical problem is examined in the presence of Lorentz forces to investigate the effects of magnetic field on double diffusion process along with Joule heating. The non-Newtonian Casson nanofluid flow between two parallel plates gives the system of time-dependent, highly nonlinear, coupled partial differential equations and is solved by utilizing RK-SM and bvp4c schemes. Present results show that, the temperature and concentration distributions are fewer in case of Cattaneo-Christov heat and mass flux models when compared to the Fourier’s and Fick’s laws of heat and mass diffusions. The concentration field is a diminishing function of thermophoresis parameter and it is an increasing function of Brownian motion parameter. Finally, an excellent comparison between the present solutions and previously published results show the accuracy of the results and methods used to achieve the objective of the present work.

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