Diseño de tanques en acuicultura intensiva

Article en revista divulgativa: ipac Acuicultura 64, pp 14-15El diseño apropiado de los tanques para una instalación acuícola debe ajustarse al comportamiento de la especie, optimizando su actividad natatoria y mejorando el bienestar a través de la reducción del nivel de estrés.Postprint (published version

Use of the tank resistance coefficient to evaluate modifications of water inlet devices in rotating flowtanks

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Distribution of velocities in aquaculture circular tanks with rotating flow and evaluation of uniformity

Postprint (published version

Influence of fish swimming on the flow pattern of circular tanks

The effect of swimming fish on the average velocity and velocity profile of a circular tank was studied. Working with different inlet diameters and flow rates, nine different impulse forces (configurations) were evaluated. Each configuration was tested with and without fish, and the effects of two different fish sizes were compared. The velocity profiles in experiments with fish presented a considerable reduction in velocity in the centre of the tank near the outlet, which was a consequence of the increase in the kinematic eddy viscosity due to the turbulence introduced by fish swimming. A flattening of the angular velocity profile was observed in the central area of the tank, which had a radius of about 0.3 m (18% of the total volume of the tank). A previous model proposed by Oca and Masaló (2013) was modified in order to better describe the distribution of velocities in the central volume of a tank with swimming fish. The proposed modification was based on Burgers¿ proposal for a bathtub vortex, which implies the determination of the parameter (1¿e¿ar2)(1¿e¿ar2), where r is the radius and the a values were experimentally obtained for each tank configuration, in which they increased with the impulse force. The average velocities in the tank were proportional to the square root of the impulse force in experiments with and without fish. Experiments with fish presented lower average velocities, which imply higher tank resistance coefficients. At similar stocking densities (14.6 kg/m3), the increase in the tank resistance coefficients obtained with small fish sizes (154 g) were slightly higher than those obtained with bigger fish sizes (330 g).This work was funded by Spanish Ministerio de Educación y Ciencia (AGL2009-1655).Postprint (updated version

Design criteria for rotating flow cells in rectangular aquaculture tanks

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Evaluación hidrodinámica de un tanque acuícola tipo multivórtice

Postprint (published version

Fish swimming modifies flow pattern in aquacultural tanks

Circular tank geometry is very common in aquaculture because it provides more stable flow patterns, more homogeneous distribution of oxygen and metabolites, better self cleaning features, and higher average velocities than rectangular tanks, thanks to the rotating flow characteristics.Postprint (published version

Improving the oscillating grid method to characterize aquaculture biosolids using a laser beam and image analysis

Quick removal of biosolids in aquaculture facilities, and specially in recirculating aquaculture systems (RAS), is one of the most important step in waste management . Sedimentation dynamics of biosolids in an aquaculture tank will determine their accumulation at the bottom of the tank .Postprint (published version

Study of consecutive resuspension and sedimentation processes in aquacultural biosolids using an oscillating grid

Peer Reviewe

Acoustic doppler velocimetry allows determining daily swimming activity of sea bass (dicentrarchus labrax, I)

Peer Reviewe