Searched for: author%3A%22Shamasundar%2C+R.%22
(1 - 5 of 5)
document
Shamasundar, R. (author)
Demand for hydrocarbon fuel is predicted to keep increasing in the coming decades in spite of easily accessible alternative fuels due to shifting geopolitical and economic situations. In order to find new hydrocarbon pockets, we need sharper images of earth’s subsurface. Also, the exploration of other sources of energy like geothermal will...
doctoral thesis 2019
document
Shamasundar, R. (author), Mulder, W.A. (author)
Finite elements can, in some cases, outperform finite-difference methods for modelling wave propagation in complex geological models with topography. In the weak form of the finiteelement method, the delta function is a natural way to represent a point source. If, instead of the usual second-order form, the first-order form of the wave equation...
journal article 2018
document
Shamasundar, R. (author), Mulder, W.A. (author)
For seismic modelling, imaging and inversion, finite-difference methods are still the workhorse of the industry despite their inability to meet the increasing demand for improved accuracy in subsurface imaging. Finiteelement methods offer better accuracy but at a higher computational cost. A stress-velocity formulation with linear elements and...
conference paper 2017
document
Shamasundar, R. (author), Mulder, W.A. (author)
The second-order formulation of the wave equation is often used for spectral-element discretizations. For some applications, however, a first-order formulation may be desirable. It can, in theory, provide much better accuracy in terms of numerical dispersion if the consistent mass matrix is used and the degree of the polynomial basis functions...
conference paper 2016
document
Shamasundar, R. (author), Al-Khoury, R.I.N. (author), Mulder, W.A. (author)
We investigated one-dimensional numerical dispersion curves and error behaviour of four finite-element schemes with polynomial basis functions: the standard elements with equidistant nodes, the Legendre-Gauss-Lobatto points, the Chebyshev-Gauss-Lobatto nodes without a weighting function and with. Mass lumping, required for efficiency reasons and...
conference paper 2015
Searched for: author%3A%22Shamasundar%2C+R.%22
(1 - 5 of 5)