Showing papers by "K. Murali published in 2007"
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
TL;DR: This paper conducted surveys along the east and west coasts of peninsular India focusing on the states of Tamil Nadu and Kerala and around Andaman and Nicobar Islands, where the devastation caused by the tsunami was unparalleled.
Abstract: The December 2004 Sumatra earthquake triggered massive tsunami waves in the Indian Ocean and the Bay of Bengal. The tsunami waves traveled primarily in the east-west direction and caused major damage along the coasts of southern India, Sri Lanka, Thailand, and Indonesia. It has proved to be the most disastrous tsunami in recorded history, and scientists and engineers around the world set out to record signatures of the tsunami from which the characteristics of the tsunami waves at the time of landfall could be deciphered. Such information is extremely useful in validating mathematical models for understanding the characteristics of tsunamis and their effects along the coast. The writers conducted surveys along the east and west coasts of peninsular India—focusing on the states of Tamil Nadu and Kerala and around Andaman and Nicobar Islands, where the devastation caused by the tsunami was unparalleled. The analysis of data gathered during the post-sunami survey focused on consolidating the primary paramete...
20 citations
01 Jan 2007
TL;DR: In this paper, the authors used an Unstructured Explicit Finite Element Method (UEFEM) to simulate the propagation of the waves due to an artificially imposed initial disturbance.
Abstract: Shallow Water Equations are solved using an Unstructured Explicit Finite Element Method (UEFEM) to simulate long waves in the ocean. The formulation of the UEFEM has been described and found to be computationally efficient for large problems such as basin level modeling of tsunamis. Different domains have been considered to simulate the propagation of the waves due to an artificially imposed initial disturbance. The domain of Bay of Bengal has been considered for simulation with an initial disturbance which resembles the type and location of the 2004 Indian Ocean Tsunami. The Wave elevation and deformations as well as time of travel of tsunami are reproduced. The method hence has high potential of being attractive for application of simulation of global tsunamis.Copyright © 2007 by ASME
3 citations
TL;DR: In this paper, the interaction of continuous freshwater flow from an upstream basin into a bar-blocked estuary is investigated following the ideas previously proposed by Debler and Imberger.
Abstract: The interaction of continuous freshwater flow from an upstream basin into a bar-blocked estuary is investigated following ideas previously proposed by Debler and Imberger. The interface point, defined as the point of confluence between the initial saltwater wedge and the freshwater, is considered to be characteristic of the interaction between the water bodies. The previous semiempirical model of Coates and Guo has been reconsidered on the basis of realistic wedge shapes obtained from physical and numerical experiments. The approach considers conservation and conversion of energies in the dynamic environment. The present approach enabled the writers to obtain a semiempirical model that matches published experimental data fit for the initial phase of the wedge displacement. It is observed that the new model complements the earlier relationship of Coates and Guo for predicting the salt wedge dynamics for the initial phase of the interaction.
1 citations
TL;DR: In this article, a robust interface-tracking method is used to simulate interfacial flow simulations using one fluid formulation, where a single set of governing equations for the whole computational domain with variable material properties is solved.
1 citations