An investigation of free surface effects on drag and lift coefficients of an autonomous underwater vehicle (AUV) using computational and experimental fluid dynamics methods

Drag and lift contribution to the incipient motion of partly submerged flooded vehicles

“…Given that the study is focused on the estimation of integral quantities such as forces, rather than on the detailed description of the flow properties in terms of local distributions, simulations were performed using the default turbulence settings of the numerical code, avoiding the calibration of the model coefficients (www.openfoam.org). Different turbulence models are adopted in literature for the study of air flows past bluff bodies (Eriksson, 2007;Mansoorzadeh and Javanmard, 2014;Papadakis et al, 2014) and for simulating free-surface flows around structures (Losada et al, 2005;Prasad et al, 2015) or flood waves (Ozmen-Cagatay et al, 2014). Moreover, the lack of detailed experimental data does not allow an ad hoc calibration of the coefficients.…”

Experimental and Numerical Investigation of a Longfin Inshore Squid’s Flow Characteristics

“…More recently, Randeni et al (2015) studied the hydrodynamic characteristics of two underwater bodies moving together numerically. The effect of drag and lift forces were examined for an AUV experimentally and numerically by Mansoorzadeh and Javanmard (2014). The flow characteristics of the AUV model was tested at a water pool and then compared with a numerical model.…”

Experimental and numerical investigation of the hydrodynamic characteristics of Autonomous Underwater Vehicles over sea-beds with complex topography

“…This requires that the AUV design be as optimal as possible, necessitating a careful analysis of the hydrodynamic performance of the AUV structure. Several experimental and numerical studies are available in the literature to analyze the hydrodynamic parameters around AUVs [3,4,5,6,7,8,9,10,11,12,13,14,15].Mansoorzadeh and Javanmard [3] have studied the effect of free surface on drag and lift coefficients of AUV at different submergence depths and compared the experimental data with the computational fluid dynamics (CFD) simulations. It was observed that hydrodynamic coefficients were very much responsive to the submergence depth and AUV speed.…”

“…Mansoorzadeh and Javanmard [3] have studied the effect of free surface on drag and lift coefficients of AUV at different submergence depths and compared the experimental data with the computational fluid dynamics (CFD) simulations. It was observed that hydrodynamic coefficients were very much responsive to the submergence depth and AUV speed.…”

“…In the context of flow over AUV designs, most such flows are turbulent and the designers use turbulence models to account for the effects of turbulence. Most researchers investigating AUV designs( [17,14,23,3]) have used two equation turbulence models for the flow analysis across the AUV. The two equation based turbulence models like k − and k − ω models offer moderate fidelity in predictions at low computational cost.…”