| || Off shore sea and swell studies in the the Indian seas
Author : Srivastava, P. S.;Thomas, K. John;Nair, D. K.
Source : Defence Science Journal ; Vol:16(1) ; 1966 ; pp 47-50
Subject : 551.46 Oceanography
Keywords : Oceanography;Swells;High frequency waves;Wind waves;India;seas
Abstract : Off shore sen and swell measurements on board LNS KISTNA during the international Indian Ocean Expedition have been presented. Spatial diagrams showing significant height, average period and direction of wave approach have been given. A comparative study of wave hindcasts using Wilson’s method with the observed values has been presented.
| || On Propagation of One Dimensional Small Amplitude Waves in Radiating Viscous and Heat Conducting Gas
Author : Tagare, S.G.
Source : Defence Science Journal ; Vol:19(3) ; 1969 ; pp 167-176
Subject : 536 Thermodynamics
Keywords : High frequency waves ;Radiation induced mode;Heat conduction
Abstract : "In this paper, effect of radiation, heat-conduction and viscosity on propagation of one-dimensional small amplitude waves is investigated. It is shown that there are three distinct modes of propagation viz. (i) Radiation-induced mode, (ii) Modified gasdynamic mode and (iii) Coupled heat-conduction and viscous mode. The dispersion relation is solved both asymptotically and numerically. For very small values of omega, the asymptotic solution predicts the speed of propagation of distriubance as zero, as (isentropic sound velocity) and 0.336 times the isothermal sound velocity. For very large values of omega, the high frequency waves propagate with characteristic speeds of the seventh order operation. "