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K. Murali

Bio: K. Murali is an academic researcher from Indian Institute of Technology Madras. The author has contributed to research in topics: Breakwater & Finite element method. The author has an hindex of 14, co-authored 73 publications receiving 700 citations. Previous affiliations of K. Murali include Swansea University & Institute of High Performance Computing Singapore.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the influence of free surface effects on hydrodynamic coefficients of an axisymmetric underwater body using Reynolds averaged Navier-Stokes (RANS) solver is assessed.
Abstract: The aim of the current investigation is an assessment of the influence of free surface effects on hydrodynamic coefficients of an axisymmetric underwater body using Reynolds averaged Navier-Stokes (RANS) solver. This paper mainly focuses on the capabilities of turbulence models (two high-Re models, k-e Re-Normalised Group (RNG) and k-e Realizable and one low-Re model, k-e Abe-Kondoh-Nagano (AKN) together with volume of fluid (VOF) method for hydrodynamic investigation of an axisymmetric underwater body (Afterbody1) near the free surface. The current numerical investigations were carried out to simulate measured hydrodynamic coefficients for several experimental parameters, including velocity variations from 0.4 m/s (Reynolds number Rev = 2.12x 105) to m/s (Reynolds number Rev = 7.42 x 105), depth of submergence from 0.75D to 4.0D, and angle of attack 0° to 15° on a vertical plane for a model scale of 1:2. Numerical simulations were conducted at a grid density of 0.46 million cells based on grid in...

36 citations

Journal ArticleDOI
15 Aug 2016-Energy
TL;DR: In this paper, a new analytical model is proposed to predict the efficiency of the oscillating system from the field values such as maximum amplitude response (Ymax) and frequency ratio (f*).

34 citations

Journal ArticleDOI
TL;DR: In this article, a test program was carried out to study the changes in the particle level of soil systems attributed to lime in a marine environment and the formation of various new reaction products due to soil-lime reactions were identified by X-Ray Diffraction (XRD) and the same was investigated using Scanning Electron Microscope (SEM).

33 citations

Journal ArticleDOI
TL;DR: In this paper, the authors studied the wave runup and rundown at the leading and trailing edges of a perforated cylinder in a wave flume and found that the maximum wave run-up on the perforation is almost the same as the incident wave height.

33 citations

Journal ArticleDOI
TL;DR: In this article, a perforated circular cylinder (0.50 m diameter) encircling an impermeable cylinder ( 0.05m diameter) at a constant water depth of 0.7 m for both regular and random waves in the wave flume at the Department of Ocean Engineering, Indian Institute of Technology, Madras, India.
Abstract: An experimental investigations was carried out on a perforated circular cylinder ( 0.50 m diameter) encircling an impermeable cylinder ( 0.05 m diameter) at a constant water depth of 0.7 m for both regular and random waves in the wave flume at the Department of Ocean Engineering, Indian Institute of Technology, Madras, India. The porosity of the outer cylinder was varied from 4.54 to 19.15% to study the influence of porosity on wave forces on and water surface fluctuations in and around the twin cylinder system. A numerical method is developed based on the boundary integral equation method along with a porous body boundary condition, where the porosity is modeled using the resistance coefficient f and added mass coefficient Ca for regular waves. The resistance coefficient increases with the increase in porosity and wave heights except for a porosity of 4.54%, whereas the added mass coefficient is almost zero. Porosity in the range of 10–15% can be recommended for the perforated cylinder based on the exper...

31 citations


Cited by
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Journal ArticleDOI
TL;DR: In this paper, the authors present a review of the recent advances in the assessment of loads for ships and offshore structures with the aim to draw the overall technological landscape available for further understanding, validation and implementation by the academic and industrial communities.

226 citations

Journal ArticleDOI
TL;DR: In this paper, the authors reviewed the earlier reported case histories of sulphate attack in lime and cement stabilized clays and a list of precautionary measures to be adopted for controlling the ettringite formation have been suggested.

203 citations

Journal ArticleDOI
01 Apr 2019-Energy
TL;DR: In this paper, a galloping-based piezoelectric energy harvester (GPEH) with triangular cross-section bluff bodies with different vertex angles is investigated, and the aerodynamic characteristics are determined by Computational Fluid Dynamics (CFD) and verified by experimental data.

194 citations

Journal ArticleDOI
TL;DR: In this article, a team surveyed the effects of the December 2004 Indian Ocean tsunami on the southern coast of Oman and found that runup and inundation were obtained at 41 sites, extending over a total of 750 km of shoreline.
Abstract: In August 2005, a team surveyed the effects of the December 2004 Indian Ocean tsunami on the southern coast of Oman. Runup and inundation were obtained at 41 sites, extending over a total of 750 km of shoreline. Measured runup ranged from 3.25 m in the vicinity of Salalah to a negligible value at one location on Masirah Island. In general, the largest values were found in the western part of the surveyed area. Significant incidents were documented in the port of Salalah, where a 285-m-long vessel broke its moorings and drifted inside and outside the port, and another ship struck the breakwater while attempting to enter the harbor. The general hazard to Oman from tsunamis may be greatest from the neighboring Makran subduction zone in western Pakistan.

183 citations