Publication

Validating formulas for the prediction of ascent speed and mass transfer coefficient for liquid oil droplets and gas bubbles under pressure

2015
Posters

Abstract

Several different formulas exist to predict the ascent speed of gas bubbles and oil droplets released in deep waters. Similarly, different formulas are also available to predict the mass transfer coefficient of compounds dissolving into water during ascent. However, the formulas used by different authors for the modeling of the ascent and mass transfer processes of liquid oil droplets or gas bubbles under pressure can lead to widely different predictions. In this work, we investigate the abilities of different formulas to reproduce literature laboratory data for the ascent speed and mass transfer coefficient for liquid droplets and gas bubbles under pressure. We found that the ascent speed is usually well predicted by a combination of formulas by Clift et al. (1978) or by the Fan-Tsuchiya equation, with mean errors

Official source

https://infoscience.epfl.ch/entities/publication/56f3bc15-e15d-4998-968a-726286d3214b

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2015
Posters

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/56f3bc15-e15d-4998-968a-726286d3214b

About this result

Related concepts (32)

Data

In common usage and statistics, data (USˈdætə; UKˈdeɪtə) is a collection of discrete or continuous values that convey information, describing the quantity, quality, fact, statistics, other basic units of meaning, or simply sequences of symbols that may be further interpreted formally. A datum is an individual value in a collection of data. Data is usually organized into structures such as tables that provide additional context and meaning, and which may themselves be used as data in larger structures.

Chemical formula

In chemistry, a chemical formula is a way of presenting information about the chemical proportions of atoms that constitute a particular chemical compound or molecule, using chemical element symbols, numbers, and sometimes also other symbols, such as parentheses, dashes, brackets, commas and plus (+) and minus (−) signs. These are limited to a single typographic line of symbols, which may include subscripts and superscripts. A chemical formula is not a chemical name since it does not contain any words.

Drop (liquid)

A drop or droplet is a small column of liquid, bounded completely or almost completely by free surfaces. A drop may form when liquid accumulates at the lower end of a tube or other surface boundary, producing a hanging drop called a pendant drop. Drops may also be formed by the condensation of a vapor or by atomization of a larger mass of solid. Water vapor will condense into droplets depending on the temperature. The temperature at which droplets form is called the dew point. Liquid forms drops because it exhibits surface tension.

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Validating formulas for the prediction of ascent speed and mass transfer coefficient for liquid oil droplets and gas bubbles under pressure

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