Journal ArticleDOI
Drag coefficients of variously shaped solid particles, drops, and bubbles
TLDR
The most important theoretical formulas for small Reynolds numbers of Re ≪ 1 and semi-empirical formulas for the drag coefficient in a wide Re range up to 106 are presented in this paper.Abstract:
This article, which is largely a review, deals with the drag force and drag coefficient for rigid spherical and deformable particles in ordinary and non-Newtonian fluids. The most important theoretical formulas for small Reynolds numbers of Re ≪ 1 and semiempirical formulas for the drag coefficient in a wide Re range up to 106 are presented. The deformation of drops and bubbles and its effect on the drag coefficient are considered.read more
Citations
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Journal ArticleDOI
The settling velocity of mineral, biomineral, and biological particles and aggregates in water
TL;DR: In this paper, a new equation was developed to relate the size and settling velocity of particulate matter commonly recurring in aqueous ecosystems, which allowed for an algebraic solution of the settling velocity, thus overcoming earlier approaches that required iterative numerical solutions.
Journal ArticleDOI
Review of the empirical correlations for the drag coefficient of rigid spheres
TL;DR: The Stokes-Newton equation was proposed in this article as a landmark for the relation between the drag coefficient and the Reynolds number, and the results of this landmark correlation were cross-compared with the estimates of the direct and indirect correlations and with the data set of the historical Standard Drag Curve.
Journal ArticleDOI
Laminar forced convection of a nanofluid in a microchannel: Effect of flow inertia and external forces on heat transfer and fluid flow characteristics
Mahmoud Ahmed,Morteza Eslamian +1 more
TL;DR: In this paper, a multi-phase Lattice Boltzmann method was used to explore some unprecedented aspects of laminar forced convection in a bottom heated rectangular microchannel.
Journal ArticleDOI
Sinking of microbial-associated microplastics in natural waters.
TL;DR: This work experimentally demonstrates using a novel OMCEC (Optical Measurement of CEll colonisation) system that the biological fraction of MP aggregates has substantial control over their size, shape and, most importantly, their settling velocity.
Journal ArticleDOI
Dynamics of rising CO2 bubble plumes in the QICS field experiment: Part 1 – The experiment
TL;DR: In this paper, the dynamics of CO2 bubble plumes in seawater from the sediments were analyzed in terms of Eotvos and Reynolds numbers, and it was found that most of the bubbles deform to non-spherical bubbles and measured equivalent diameters of the CO2 bubbles observed near the sea bed are to be between 2 and 12 mm.
References
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Journal Article
Bubbles, Drops, and Particles
TL;DR: In this paper, the authors evaluated the applicability of the standard κ-ϵ equations and other turbulence models with respect to their applicability in swirling, recirculating flows.
Book
Low Reynolds number hydrodynamics : with special applications to particulate media
John Happel,Howard Brenner +1 more
TL;DR: The Navier-Stokes equations can be employed for useful practical applications beyond the elementary problems of laminar flow in pipes and Stokes law for the motion of a single particle as mentioned in this paper.
Journal ArticleDOI
Drag coefficient and terminal velocity of spherical and nonspherical particles
A. Haider,Octave Levenspiel +1 more
TL;DR: In this paper, explicit equations for the drag coefficient and for the terminal velocity of falling spherical and nonspherical particles are developed for the CD and ut. The goodness of fit of these equations to the reported experimental data is evaluated and compared with that of other recently proposed equations.
Reference BookDOI
Springer Handbook of Experimental Fluid Mechanics
TL;DR: A central organizing theme of this handbook is that 'experimental fluid mechanics" can be understood as a parallel activity to that described above, in which basic expressions are combined to analyze a given problem and to derive new information and insight from the resulting mathematical steps of the analysis.
Related Papers (5)
Development of new empirical equations for estimation of drag coefficient, shape deformation, and rising velocity of gas bubbles or liquid drops
Gudret Kelbaliyev,Kadim Ceylan +1 more