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P.H. Calderbank

Bio: P.H. Calderbank is an academic researcher from University of Edinburgh. The author has contributed to research in topics: Mass transfer & Bubble. The author has an hindex of 14, co-authored 20 publications receiving 1716 citations.

Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors measured the interfacial area in gas-liquid dispersions and correlated the data with other published data for heat and mass transfer in liquid-liquid and solid-gas dispersions in which the dispersed phases are free to move under the action of gravity.

742 citations

Journal ArticleDOI
TL;DR: Theoretical equations are developed to describe mass transfer around any solid or rapidly circulating axisymmetric body of revolution as discussed by the authors, which apply only when the Peclet and Schmidt numbers are large in value.

262 citations

Journal ArticleDOI
TL;DR: In this paper, a constant volume technique is described for measuring the instantaneous rates of solution of rising gas bubbles in liquids; this simultaneously determines the bubble shape, area and rising velocity at the instant of measurement.

149 citations

Journal ArticleDOI
TL;DR: In this paper, the mass transfer product, k L a, was determined using unsteady state measurements of oxygen dissolution rates in water, in 0.60 m 3 and 0.043 m 3 baffled mixing vessels fitted with geometrically similar flat-bladed turbines and spargers.

105 citations

Journal ArticleDOI
TL;DR: In this paper, the mass transfer coefficients of carbon dioxide bubbles in the size range 0·4 d e d e and 0.1 cm in equivalent spherical diameter were reported. But the shape of the bubble was also recorded at the instant its solution rate was being measured.

104 citations


Cited by
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Journal ArticleDOI
TL;DR: The present work is aimed at the reviewing of the oxygen transfer rate (OTR) in bioprocesses to provide a better knowledge about the selection, design, scale-up and development of bioreactors.

1,203 citations

Journal ArticleDOI
TL;DR: The results showed that paraxanthine, caffeine and acetaminophen were the main individual pollutants usually found in concentrations over 20 ppb, and the hydroxyl radical reaction was the major pathway for the oxidative transformation of these compounds.

849 citations

Journal ArticleDOI
Abstract: The formation of gas bubbles and their subsequent rise due to buoyancy are very important fundamental phenomena that contribute significantly to the hydrodynamics in gas−liquid reactors. The rise o...

657 citations

Book
09 Jan 2004
TL;DR: In this paper, Sea salt aerosol (SSA) particles interact with other atmospheric gaseous and aerosol constituents by acting as sinks for condensable gases and suppressing new particle formation, thus influencing the size distribution of other aerosols and more broadly influencing the geochemical cycles of substances with which they interact.
Abstract: Sea salt aerosol (SSA) exerts a major influence over a broad reach of geophysics. It is important to the physics and chemistry of the marine atmosphere and to marine geochemistry and biogeochemistry generally. It affects visibility, remote sensing, atmospheric chemistry, and air quality. Sea salt aerosol particles interact with other atmospheric gaseous and aerosol constituents by acting as sinks for condensable gases and suppressing new particle formation, thus influencing the size distribution of these other aerosols and more broadly influencing the geochemical cycles of substances with which they interact. As the key aerosol constituent over much of Earth's surface at present, and all the more so in pre-industrial times, SSA is central to description of Earth's aerosol burden.

603 citations

Book ChapterDOI
TL;DR: In the past 5 years, membrane ultrafiltration has gained increasing prominence as a simple and convenient process for concentrating, purifying, and fractionating solutions of moderate-to-high molecular weight solutes and colloids, and for purifying water and other solvents containing such solutes as discussed by the authors.
Abstract: In the past 5 years, membrane ultrafiltration has gained increasing prominence as a simple and convenient process for concentrating, purifying, and fractionating solutions of moderate-to-high molecular weight solutes and colloids, and for purifying water and other solvents containing such solutes. The emergence of this new molecular separation technique for both laboratory and industrial applications is almost entirely attributable to the development of a family of uniquely structured polymeric membranes which display extraordinarily high hydraulic permeabilities coupled with the capacity to retain even quite small solute molecules.

555 citations