Browsing by Author "Kamath, K."

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Mooring forces in horizontal interlaced moored floating pipe breakwater with three layers
(2008) Hegde, A.V.; Kamath, K.; Deepak, J.C.
The paper presents the results from model scale experiments on the study of forces in the moorings of horizontally interlaced, multi-layered, moored floating pipe breakwaters. The studies are conducted with breakwater models having three layers subjected to waves of steepness Hi/L (Hi is the incident wave height and L the wavelength) varying from 0.0066 to 0.0464, relative width W/L (W is the width of breakwater) varying from 0.4 to 2.65, and relative spacing S/D (S is the spacing of pipes and D the diameter of pipe) of 2 and 4. The variation of measured normalized mooring forces on the seaward side and leeward side are analyzed by plotting non-dimensional graphs depicting f/?W2 (f is the force in the mooring per unit length of the breakwater, ? the weight density of sea water) as a function W/L for various values of Hi/d (d is the depth of water). It is found that the force in the seaward side mooring increases with an increase in Hi/L for d/W values ranging between 0.081 and 0.276. The experimental results also reveal that the forces in the seaward side mooring decrease as W/L increases, up to a value of W/L=1.3, and then increases with an increase in W/L. It is also observed that the wave attenuation characteristics of breakwater model with relative spacing of 4 is better than that of the model with relative spacing of 2. The maximum force in the seaward side mooring for model with S/D=4 is lower compared to that for the breakwater model with S/D=2. A multivariate non-linear regression analysis has been carried out for the data on mooring forces for the seaside and leeside. 2007 Elsevier Ltd. All rights reserved.
Mooring forces in horizontal interlaced moored floating pipe breakwater with three layers
(2008) Hegde, A.V.; Kamath, K.; Deepak, J.C.
The paper presents the results from model scale experiments on the study of forces in the moorings of horizontally interlaced, multi-layered, moored floating pipe breakwaters. The studies are conducted with breakwater models having three layers subjected to waves of steepness Hi/L (Hi is the incident wave height and L the wavelength) varying from 0.0066 to 0.0464, relative width W/L (W is the width of breakwater) varying from 0.4 to 2.65, and relative spacing S/D (S is the spacing of pipes and D the diameter of pipe) of 2 and 4. The variation of measured normalized mooring forces on the seaward side and leeward side are analyzed by plotting non-dimensional graphs depicting f/?W2 (f is the force in the mooring per unit length of the breakwater, ? the weight density of sea water) as a function W/L for various values of Hi/d (d is the depth of water). It is found that the force in the seaward side mooring increases with an increase in Hi/L for d/W values ranging between 0.081 and 0.276. The experimental results also reveal that the forces in the seaward side mooring decrease as W/L increases, up to a value of W/L=1.3, and then increases with an increase in W/L. It is also observed that the wave attenuation characteristics of breakwater model with relative spacing of 4 is better than that of the model with relative spacing of 2. The maximum force in the seaward side mooring for model with S/D=4 is lower compared to that for the breakwater model with S/D=2. A multivariate non-linear regression analysis has been carried out for the data on mooring forces for the seaside and leeside. © 2007 Elsevier Ltd. All rights reserved.
Performance characteristics of horizontal interlaced multilayer moored floating pipe breakwater
(2007) Hegde, A.V.; Kamath, K.; Magadum, A.S.
The paper presents the results of model scale experiments for the study of wave attenuation by horizontal interlaced, multilayer, moored floating pipe breakwater. A review of some significant floating breakwater models proposed by earlier investigators is included. For a floating breakwater the transmission coefficient (Kt) is influenced by relative width of the breakwater (W/L). Nondimensional graphs indicating the variation of Kt with respect to W/L (with Hi/L as a parameter for different Hi/d values) and Kt versus Hi/L (for a range of d/L values from 0.09 to 0.24) have been plotted. Further variation of Kt with relative depth d/L for different W/L values is also studied. From the experimental study and results obtained, it is found that the transmission coefficient decreases with an increase in relative breakwater width W/L and wave steepness Hi/L for all Hi/d values. In the present study it was observed that performance was better for breakwater configurations of W/L≥0.7 when compared with configurations of W/L<0.7. Further, the experimental results obtained were compared with the output of a mathematical model. From the comparison for Hi/L=0.04, values of Kt obtained from the present experiments were in agreement with those obtained from the mathematical model. © 2007 ASCE.
Synthesis of Praseodymium-Doped Ceria-Based Electrolyte Material by Hydrothermal Method
(Springer Science and Business Media Deutschland GmbH, 2022) Rao, R.; Kamath, K.; Priyanka, R.; Shajahan, I.; Prasad Dasari, H.P.
Praseodymium-doped ceria (PDC)-based electrolyte powder was synthesised by the hydrothermal method. The as-synthesised powder was studied by various powder characterisations such as X-ray diffraction (XRD), Raman spectroscopy and scanning electron microscopy (SEM) analysis to find out the crystallinity, phase, nature and structural morphology. The shrinkage behaviour (linear shrinkage and shrinkage rate) of PDC powder at high temperatures was performed by dilatometer studies. The crystallographic parameters including the crystallite size, lattice strain and lattice parameter were calculated from XRD analysis. Raman spectroscopy analysis revealed the characteristic peak at 460Â cmâˆ’1 which corresponds to the F2g peak of the cubic phase of ceria and the peak at 550Â cmâˆ’1 is attributed to intrinsic oxygen vacancies that confirmed the formation of ceria praseodymium solid solution. Â© 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.