Propagation of Ultrasonic Waves in Viscous Fluids

Identification of high performance solvents for the sustainable processing of graphene

“…This is consistent with the inverse relationship between the ultrasound velocity in a fluid (relevant to the initial preparation of the dispersions described here) and the viscosity of the solvent. 59 This is especially true at the beginning of the preparation procedure, when thermal agitation does not have enough time to exert an influence. We proved this experimentally by varying the duration of the ultrasound step, up to a maximum exposure time of 120 minutes.…”

Comparative Study of Pressure Wave Mathematical Models for Hp Fuel Pipeline of Ceup at Various Operating Conditions

“…Y. Nishidate and G. P. Nikishkov [10] and M. A. Rammaha [11] investigated damped WE in their mathematical model, Ryo Ikehata [12] and Fariba Fahroo [13] worked on decay estimates whereas Brian J. McCartin [14], Jaime E. and Reinhard Racke [15] and Patrick Martinez [16] researched the stability of damped WE in their mathematical models. Oudina Assia and Djelouah Hakim [17] investigated propagation of ultrasonic waves in viscous fluids whereas P. M. Jordan, Martin R. Meyer and Ashok Puri [18] and Reinhold Ludwig and Peter L. Levin [19] have investigated the influence of viscous damping on WE in their mathematical models.…”

Analysis Of Diesel And Rapeseed Methyl Ester Properties In Ceup Fuel Pipeline Using Frequency Dependent Damping Model

“…Based on these investigations a viscous damped mathematical model has been developed whose pressure predictions inside fuel pipeline of CEUP are relatively more accurate for majority of operating conditions of diesel engine [4,5]. Frequency dependent models [9][10][11][12] confirm that attenuation in pressure wave varies with frequency and it increases with the increase of frequency.…”

“…Pressure wave modeling in viscous fluids using wave equation has been utilized to investigate pressure in common rail system [8], study the effects on propagation of ultrasonic waves [9,10] and the influence of viscous damping [10]. Based on these investigations a viscous damped mathematical model has been developed whose pressure predictions inside fuel pipeline of CEUP are relatively more accurate for majority of operating conditions of diesel engine [4,5].…”

“…In this paper density, acoustic wave speed and bulk modulus for diesel and RME fuels have been investigated thoroughly using 1D frequency dependent viscous damped pressure wave model [9][10][11][12] developed in MATLAB which has also been reported earlier [6]. Lab experiments have been carried out on CEUP fuel injection system at various operating conditions of diesel engine with both diesel and RME fuels.…”