Browsing by Author "Shah, A.P."

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Effect of porous baffle on sloshing dynamics in a barge mounted container subjected to wave excitation
(2017) Thuvanismail, N.; Shah, A.P.; Surahonne, D.J.; Annamalaisamy, S.S.
An experimental investigation was carried out to determine the effect of porous baffle walls on sloshing dynamics of a sloshing tank that is partially filled with liquid and rigidly mounted in a barge. The experimental setup is subjected to beam sea regular wave excitations and hence the barge experiences combined sway heave and roll excitations. An aspect ratio (hs/l, where hs is still water level and l is length of tank) of 0.488 is considered which corresponds to 75% fill condition with respect to tank height. Three porosities of 15%, 20%, and 25% are considered. The barge system was subjected to regular waves of frequency (fw) ranging from 0.45Hz to 1.54Hz. The effectiveness of porous baffles on the dissipation of sloshing energy is studied in comparison with without baffle condition. The effect of wave excitation frequency on the sloshing dynamics has also been analysed and the prominent results are here in reported. � Copyright 2017 ASME.
Effect of porous baffle on sloshing dynamics in a barge mounted container subjected to wave excitation
(American Society of Mechanical Engineers (ASME) infocentral@asme.org, 2017) Thuvanismail, N.; Shah, A.P.; Surahonne, D.J.; Sannasiraj, S.S.
An experimental investigation was carried out to determine the effect of porous baffle walls on sloshing dynamics of a sloshing tank that is partially filled with liquid and rigidly mounted in a barge. The experimental setup is subjected to beam sea regular wave excitations and hence the barge experiences combined sway heave and roll excitations. An aspect ratio (hs/l, where hs is still water level and l is length of tank) of 0.488 is considered which corresponds to 75% fill condition with respect to tank height. Three porosities of 15%, 20%, and 25% are considered. The barge system was subjected to regular waves of frequency (fw) ranging from 0.45Hz to 1.54Hz. The effectiveness of porous baffles on the dissipation of sloshing energy is studied in comparison with without baffle condition. The effect of wave excitation frequency on the sloshing dynamics has also been analysed and the prominent results are here in reported. Â© Copyright 2017 ASME.
Effect of porous baffle on sloshing pressure distribution in a barge mounted container subjected to wave excitation
(2017) Thuvanismail, N.; Surahonne, D.J.; Shah, A.P.; Annamalaisamy, S.S.
An experimental study has been carried out to assess the sloshing pressure expected on the tank walls. Three porosities of 15%, 20.2%, 25.2% and baffle wall placed at center of tank is considered. The sloshing tank is fitted into the freely floating barge of model scale 1:43.The barge is kept inside the wave flume in the beam sea conditions. The effects of wave excitation frequencies and on the sloshing pressure variation have been studied in detail and, the salient results are herein reported. � Copyright 2017 ASME.
Effect of porous baffle on sloshing pressure distribution in a barge mounted container subjected to wave excitation
(American Society of Mechanical Engineers (ASME) infocentral@asme.org, 2017) Thuvanismail, N.; Surahonne, D.J.; Shah, A.P.; Sannasiraj, S.S.
An experimental study has been carried out to assess the sloshing pressure expected on the tank walls. Three porosities of 15%, 20.2%, 25.2% and baffle wall placed at center of tank is considered. The sloshing tank is fitted into the freely floating barge of model scale 1:43.The barge is kept inside the wave flume in the beam sea conditions. The effects of wave excitation frequencies and on the sloshing pressure variation have been studied in detail and, the salient results are herein reported. Â© Copyright 2017 ASME.
Pipelined implementation of high radix adaptive CORDIC as a coprocessor
(2016) Oza, S.S.; Shah, A.P.; Thokala, T.; Sumam, David S.
The Coordinate Rotational Digital Computer (CORDIC) algorithm allows computation of trigonometric, hyperbolic, natural log and square root functions. This iterative algorithm uses only shift and add operations to converge. Multiple fixed radix variants of the algorithm have been implemented on hardware. These have demonstrated faster convergence at the expense of reduced accuracy. High radix adaptive variants of CORDIC also exist in literature. These allow for faster convergence at the expense of hardware multipliers in the datapath without compromising on the accuracy of the results. This paper proposes a 12 stage deep pipeline architecture to implement a high radix adaptive CORDIC algorithm. It employs floating point multipliers in place of the conventional shift and add architecture of fixed radix CORDIC. This design has been synthesised on a FPGA board to act as a coprocessor. The paper also studies the power, latency and accuracy of this implementation. � 2015 IEEE.
Pipelined implementation of high radix adaptive CORDIC as a coprocessor
(Institute of Electrical and Electronics Engineers Inc., 2016) Oza, S.S.; Shah, A.P.; Thokala, T.; Sumam David, S.
The Coordinate Rotational Digital Computer (CORDIC) algorithm allows computation of trigonometric, hyperbolic, natural log and square root functions. This iterative algorithm uses only shift and add operations to converge. Multiple fixed radix variants of the algorithm have been implemented on hardware. These have demonstrated faster convergence at the expense of reduced accuracy. High radix adaptive variants of CORDIC also exist in literature. These allow for faster convergence at the expense of hardware multipliers in the datapath without compromising on the accuracy of the results. This paper proposes a 12 stage deep pipeline architecture to implement a high radix adaptive CORDIC algorithm. It employs floating point multipliers in place of the conventional shift and add architecture of fixed radix CORDIC. This design has been synthesised on a FPGA board to act as a coprocessor. The paper also studies the power, latency and accuracy of this implementation. Â© 2015 IEEE.