3 citations · 6 across the 14 of their papers we have counts for
14 papers
Variational Principle for Velocity-Pressure Formulation of Navier-Stokes Equations
Shahrdad G. Sajjadi
The work described here shows that the known variational principle for the Navier-Stokes equations and the adjoint system can be modified to produce a set of Euler-Lagrange variati…
Interaction of Tollmien-Schlichting Waves in the Air with the Sea Surface
Shahrdad G. Sajjadi, Harihar Khanal
Linear stability of fully developed flows of air over water is carried out in order to study non-linear effects in the generation of solitons by wind. A linear stability analysis o…
Stability of Fully Nonlinear Stokes Waves on Deep Water: Part 1. Perturbation Theory
Shahrdad G. Sajjadi, David L. Ross
We consider a full set of harmonics for the Stokes wave in deep water in the absence of viscosity, and examine the role that higher harmonics play in modifying the classical Benjam…
Growth of unsteady wave groups by shear flows
S. G. Sajjadi, J. C. R. Hunt, F. Drullion
A weakly nonlinear theory has been proposed and developed for calculating the energy- transfer rate to individual waves in a group. It is shown what portion of total energy- transf…
A Study of Energy Transfer of Wind and Ocean Waves
Mason Bray, Sharhdad G. Sajjadi
To develop a better understanding of energy transfer between wind and different types of waves a model was created to determine growth factors and energy transfers on breaking wave…
An asymptotic analysis for generation of unsteady surface waves on deep water by turbulence
S. G. Sajjadi
The detailed mathematical study of the recent paper by Sajjadi, Hunt and Drullion (2014) is pre- sented. The mathematical developement considered by them, for unsteady growing mono…
Growth of Stokes Waves Induced by Wind on a Viscous Liquid of Infinite Depth
S. G. Sajjadi
The original investigation of Lamb (1932, §349) for the effect of viscosity on monochromatic surface waves is extended to account for second-order Stokes surface waves on deep wate…
Exact analytical solution of viscous Korteweg-deVries equation for water waves
S. G. Sajjadi, T. A. Smith
The evolution of a solitary wave with very weak nonlinearity which was originally investigated by Miles [4] is revisited. The solution for a one-dimensional gravity wave in a water…
Wave Motion Induced By Turbulent Shear Flows Over Growing Stokes Waves
Shahrdad G. Sajjadi, Sarena Robertson, Rebecca Harvey +1
The recent analytical of multi-layer analyses proposed by Sajjadi, Hunt and Drullion (2014) (SHD14) is solved numerically for atmospheric turbulent shear fows blowing over unsteady…
Formation of three-dimensional surface waves on deep-water using elliptic solutions of nonlinear Schrödinger equation
Shahrdad G. Sajjadi, Stefan C. Mancas, Frederique Drullion
A review of three-dimensional waves on deep-water is presented. Three forms of three dimensionality, namely oblique, forced and spontaneous type, are identified. An alternative for…
Micro cavitation bubbles on the movement of an experimental submarine Theory and Experiments
Stefan C. Mancas, Shahrdad G. Sajjadi, Asalie Anderson +1
To further understand their nature, micro cavitation bubbles were systematically diffused around the exterior of a test body (tube) fully submerged in a water tank. The primary pur…
Asymptotic Multi-Layer Analysis of Wind Over Unsteady Monochromatic Surface Waves
S. G. Sajjadi, J. C. R. Hunt, F. Drullion
Asymptotic multi-layer analyses and computation of solutions for turbulent flows over steady and unsteady monochromatic surface wave are reviewed, in the limits of low turbulent st…
Interactions and Focusing of Nonlinear Water Waves
Harihar Khanal, Stefan C. Mancas, Shahrdad Sajjadi
The coupled cubic nonlinear Schrödinger (CNLS) equations are used to study modulational instabilities of a pair of nonlinearly interacting two-dimensional waves in deep water. It h…
Solitary waves, periodic and elliptic solutions to the Benjamin, Bona & Mahony (BBM) equation modified by viscosity
Stefan C. Mancas, Harihar Khanal, Shardad G. Sajjadi
In this paper, we use a traveling wave reduction or a so-called spatial approximation to comprehensively investigate periodic and solitary wave solutions of the modified Benjamin,…