A dual sensor device to estimate fluid flow velocity at diffuse hydrothermal vents
A dual sensor device to estimate fluid flow velocity at diffuse hydrothermal vents
Date
2009-06-12
Authors
Sarrazin, Jozée
Rodier, P.
Tivey, Margaret K.
Singh, Hanumant
Schultz, A.
Sarradin, Pierre-Marie
Rodier, P.
Tivey, Margaret K.
Singh, Hanumant
Schultz, A.
Sarradin, Pierre-Marie
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Keywords
Fluid flow velocity
Hydrothermal vent
Hot film anemometer
Video imagery
Diffuse flow
Hydrothermal vent
Hot film anemometer
Video imagery
Diffuse flow
Abstract
Numerous attempts have been made over the last thirty years to estimate fluid flow
rates at hydrothermal vents, either at the exit of black smoker chimneys or within
diffuse flow areas. In this study, we combine two methods to accurately estimate fluid
flow velocities at diffuse flow areas. While the first method uses a hot film
anemometer that performs high frequency measurements, the second allows a
relatively rapid assessment of fluid flow velocity through video imagery and provides
in situ data to calibrate the sensor. Measurements of flow velocities on hydrothermal
diffuse flow areas were obtained on the Mid-Atlantic Ridge (MAR). They range from
1.1 to 4.9 mm/sec., at the substratum level, in low temperature (4.5 to 16.4°C) diffuse
flow areas from the Tour Eiffel sulfide edifice. A strong correlation was observed
between fluid flow velocities and temperature, supporting the possible use of
temperature as a proxy to estimate flow rates in diffuse flow areas where such a
simple linear flow/temperature relation is shown to dominate.
Description
Author Posting. © The Author(s), 2009. This is the author's version of the work. It is posted here by permission of Elsevier B.V. for personal use, not for redistribution. The definitive version was published in Deep Sea Research Part I: Oceanographic Research Papers 56 (2009): 2065-2074, doi:10.1016/j.dsr.2009.06.008.