# Sergey A SuslovSwinburne University of Technology · Department of Mathematics

Sergey A Suslov

Professor

## About

111

Publications

11,252

Reads

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818

Citations

Citations since 2016

Introduction

Additional affiliations

January 2020 - present

November 2008 - December 2019

January 1999 - November 2008

Education

July 1994 - July 1997

September 1992 - June 1994

September 1985 - June 1991

## Publications

Publications (111)

Heat transfer enhancement due to thermomagnetic convection arising in non-isothermal electrically non- conducting ferrofluids placed in an external magnetic field is reviewed with the emphasis on realistic applications. It is shown that due to a complex composition of such fluids numerous internal physical processes can lead to directly opposite he...

Gas bubbles present in liquids underpin many natural phenomena and human-developed technologies that improve the quality of life. Since all living organisms are predominantly made of water, they may also contain bubbles—introduced both naturally and artificially—that can serve as biomechanical sensors operating in hard-to-reach places inside a livi...

Gas bubbles present in liquids underpin many natural phenomena and human-developed technologies that improve the quality of life. Since all living organisms are predominantly made of water, they may also contain gas bubbles—introduced both naturally and artificially—that can serve as biomechanical sensors operating in hard-to-reach places inside a...

Frequency combs (FCs)—spectra containing equidistant coherent peaks—have enabled researchers and engineers to measure the frequencies of complex signals with high precision, thereby revolutionising the areas of sensing, metrology and communications and also benefiting the fundamental science. Although mostly optical FCs have found widespread applic...

Frequency combs (FCs)—spectra containing equidistant coherent peaks—have enabled researchers and engineers to measure the frequencies of complex signals with high precision thereby revolutionising the areas of sensing, metrology and communications and also benefiting the fundamental science. Although mostly optical FCs have found widespread applica...

In the framework of physical reservoir computing (RC), machine learning algorithms designed for digital computers are executed using analog computerlike nonlinear physical systems that can provide energy-efficient computational power for predicting time-dependent quantities that can be found using nonlinear differential equations. We suggest a bubb...

Physical reservoir computing (RC) is a computational framework, where machine learning algorithms designed for digital computers are executed using analog computer-like nonlinear physical systems that can provide high computational power for predicting time-dependent quantities that can be found using nonlinear differential equations. Here we sugge...

The Eulerian multi-fluid mathematical model is developed to describe the marine atmospheric boundary layer laden with sea spray under high wind condition of a hurricane. The model considers spray and air as separate continuous interacting turbulent media and employs the multi-fluid E – ε closure. Each phase is described by its own set of coupled co...

Acoustic frequency combs leverage unique properties of the optical frequency comb technology in high-precision measurements and innovative sensing in optically inaccessible environments such as under water, under ground, or inside living organisms. Because acoustic combs with wide spectra would be required for many of these applications but techniq...

Spiking behavior and a high degree of intensity correlation of frequency up- and down-converted directional radiation from population-inverted alkali vapors excited with a continuous-wave laser pumping are attributed to cooperative effects.

Information on a previously published paper

Acoustic frequency combs leverage unique properties of the optical frequency comb technology in high-precision measurements and innovative sensing in optically inaccessible environments such as under water, under ground or inside living organisms. Because acoustic combs with wide spectra would be required for many of these applications but techniqu...

We propose a new approach to the generation of acoustic frequency combs (AFC)—signals with spectra containing equidistant coherent peaks. AFCs are essential for a number of sensing and measurement applications, where the established technology of optical frequency combs suffers from fundamental physical limitations. Our proof-of-principle experimen...

Spiking and oscillation in the intensity of frequency up-converted collimated blue emission in Rb vapor are attributed to temporal properties of emission on the population-inverted 5D5/2-6P3/2 transition and discussed in the context of cooperative effects.

We propose a new approach to the generation of acoustic frequency combs (AFC)-signals with spectra containing equidistant coherent peaks. AFCs are essential for a number of sensing and measurement applications, where the established technology of optical frequency combs suffers from fundamental physical limitations. Our proof-of-principle experimen...

A previously unreported regime of type III intermittency is observed in a vertically vibrated milliliter-sized liquid drop submerged in a more viscous and less dense immiscible fluid layer supported by a hydrophobic solid plate. As the vibration amplitude is gradually increased, subharmonic Faraday waves are excited at the upper surface of the drop...

We present experimental results complemented with numerical simulations of a recently discovered instability observed in a free-surface flow driven by an azimuthal electromagnetic force in a thin annular layer of an electrolyte between two concentric cylindrical electrodes. The flow instability leads to the formation of travelling anticyclonic vort...

We propose a new approach to the generation of acoustic frequency combs (AFC)---signals with spectra containing equidistant coherent peaks. AFCs are essential for a number of sensing and measurement applications, where the established technology of optical frequency combs suffers from fundamental physical limitations. Our proof-of-principle experim...

A circumferential flow of a conducting fluid in an annular channel can be created by the action of a Lorentz force arising as a result of the interaction between an applied vertical magnetic field and a radial electric current flowing through the electrolyte. Quite unexpectedly, experiments revealed that a robust vortex system appears near the oute...

A previously unreported regime of type III intermittency is observed in a vertically vibrated milliliter-sized liquid drop submerged in a more viscous and less dense immiscible fluid layer supported by a hydrophobic solid plate. As the vibration amplitude is gradually increased, subharmonic Faraday waves are excited at the upper surface of the drop...

We report on spiking dynamics of frequency upconverted emission at 420 nm generated on the 6P3/2−5S1/2 transition in Rb vapor two-photon excited to the 5D5/2 level with laser light at 780 and 776 nm. The spike duration is shorter than the natural lifetime of any excited level involved in the interaction with both continuous and pulsed pump radiatio...

Linear stability and saddle-node bifurcation of electromagnetically driven electrolyte flow in an annular layer - Volume 887 - John McCloughan, Sergey A. Suslov

Irradiation with UV-C band ultraviolet light is one of the most commonly used ways of disinfecting water contaminated by pathogens such as bacteria and viruses. Sonoluminescence, the emission of light from acoustically-induced collapse of air bubbles in water, is an efficient means of generating UV-C light. However, because a spherical bubble colla...

Irradiation with UV-C band ultraviolet light is one of the most commonly used ways of disinfecting water contaminated by pathogens such as bacteria and viruses. Sonoluminescence, the emission of light from acoustically-induced collapse of air bubbles in water, is an efficient means of generating UV-C light. However, because a spherical bubble colla...

A detailed analysis of the evaporating ocean spray effect on the vertical latent and sensible heat fluxes in a marine atmospheric boundary layer (MABL) for different droplet sizes, vertical distributions of air temperature, humidity, and turbulent intensity is presented. For our analysis we have employed a two-temperature nonequilibrium MABL model...

The interacting thermogravitational and thermomagnetic instabilities arising in a vertical layer of non-isothermal ferrofluid placed in a horizontal magnetic field are investigated by means of a weakly nonlinear analysis. An expansion in disturbance amplitude leads to the reduction of a full problem to a system of coupled cubic Landau amplitude equ...

Ferrofluids are strongly magneto-polarisable nanofluids. Their flows can be non-intrusively controlled by applying an external magnetic field. One of their prospective applications is as a heat carrier in thermal management systems operating in conditions where natural convection is suppressed due to extreme confinement (microelectronics) or reduce...

A weakly nonlinear stability analysis of shear flows based on amplitude expansion is re-examined. While it has been known that the condition required to define the coefficients of the resulting Stuart–Landau series representing the nonlinear temporal evolution of the most amplified Fourier component of a disturbance is not unique, we show that it c...

Specific features of thermogravitational instability and thermogravitational flows arising in ferrofluids are discussed. It is shown that in contrast to ordinary fluids, the characteristics of convection setting in ferrofluids depend on the history of its storage and the conditions of experiment. This is found to be due to a complex composition of...

In this chapter the equations describing flows of non-isothermal ferrofluids and the corresponding boundary conditions are summarised. The main physical assumptions under which these equations are valid are discussed, and references to further reading are given. The constitutive equations for ferrofluid magnetisation are also reviewed. It is emphas...

A brief history and an overview of the current state of knowledge of ferrofluids (also known as ferrocolloids or ferro-nanofluids) are given. Applications of ferrofluids as advanced heat carrier media in heat management systems are emphasised. It is discussed that in the absence of a magnetic field, ferrofluids can be considered as a type of synthe...

The methodology of experimental investigation of thermogravitational and thermomagnetic convection in ferrofluids is discussed. The necessary physical conditions for the observation of thermomagnetic convection in external uniform magnetic field are identified. The methods of registering heat fluxes and visualising convection flow patterns in nontr...

The thermomagnetic mechanism of convection is considered at various orientations of the applied uniform magnetic field with respect to the temperature gradient and of the fluid layer with respect to the gravity. Its interaction with the thermogravitational mechanism is discussed. Experimental maps of stability convection-free states are obtained. H...

The chapter discusses results of hydrodynamic stability analysis of non-isothermal ferrofluid flow arising between two parallel infinite plates maintained at different temperatures and placed in a uniform external magnetic field of various orientations. To distinguish between gravitational and magnetic buoyancy effects in the most straightforward w...

Population inversion on the 5D5/2−6P3/2 transition in rubidium atoms produced by cw laser excitation at different wavelengths has been analyzed by comparing the generated mid-infrared radiation at 5.23 μm originating from amplified spontaneous emission (ASE) and isotropic blue fluorescence at 420 nm. Using a novel method for detection of two-photon...

Typical experimentally observed vortices in an anticlockwise flow of electrolyte driven by the azimuthal Lorentz force.
The electromagnetic stirrer was built at the Fluid Dynamics Lab of the Renewable Energy Institute (IER-UNAM, México).

Experimental observations of an azimuthal electrolyte flow driven by Lorentz force in a thin annular fluid layer placed on top of a magnet show that it develops a robust vortical system near the outer cylindrical wall. It appears to be a result of instabilities developing on a background of steady axisymmetric flow. Therefore, the goal of this pape...

The comparative experiments on conduction/convection in a ferro-nanofluid (Prandtl number 700) and its organic base, transformer oil (Prandtl number 300), are performed in a spherical cavity heated from above/below. The experiments show that the conductivity of a ferro-nanofluid increases compared to that of its base. However convection and the ass...

Population inversion on the 5D-6P transition in Rb atoms produced by cw excitation at different wavelengths has been analysed by comparing the generated mid-IR radiation at 5.23 um originated from amplified spontaneous emission and isotropic blue fluorescence at 420 nm. A novel method of detecting two-photon excitation in atomic vapours using ASE i...

Stability of a mechanical equilibrium of ferromagnetic nanofluid and transformer oil in a spherical cavity carved inside a Plexiglas block heated from below is investigated experimentally. It is shown that in a fluid left at rest prior to the start of experiment the onset of convection is delayed and the convective motion arises abruptly acquiring...

A finite amplitude instability has been analysed to discover the exact mechanism leading to the appearance of stationary magnetoconvection patterns in a vertical layer of a non-conducting ferrofluid heated from the side and placed in an external magnetic field perpendicular to the walls. The physical results have been obtained using a version of a...

We demonstrated simple arithmetic operations via transfer of orbital angular momenta (OAM) in parametric four-wave mixing (FWM) processes in Rb vapour. Specific features of OAM transfer from resonant laser fields with different optical topological charges to the generated coherent blue light (CBL) have been considered. We have observed the conserva...

A nonequilibrium two-temperature multiphase model of the atmospheric boundary layer above wave crests that is laden with evaporating ocean spray in high-wind condition is presented. The governing equations are derived from basic physical principles of conservation of momentum, mass, and thermal energy in multiphase flows. The model derivation uses...

The stability of base gravitational convection in a layer of ferrofluid confined between two vertical wide and tall non-magnetic plates, heated from one side, cooled from the other and placed in a uniform oblique external magnetic field is studied. Two distinct mechanisms, thermo-gravitational and thermo-magnetic, are found to be responsible for th...

We report on experimentally observed addition, subtraction and cancellation
of orbital angular momentum (OAM) in the process of parametric four-wave mixing
that results in frequency up- and down-converted emission in Rb vapour.
Specific features of OAM transfer from resonant laser fields with different
optical topological charges to the spatially a...

We investigate the emergence of coherent groups in three-dimensional fully-nonlinear potential deep water waves whose initial spectrum is assumed to be of the JONSWAP type with directional distribution given by cos n θ, where n is the integer varying from 1 to 16. The analysis is based on the results of long-term wave simulations performed using a...

Linear stability of magnetoconvection of a ferromagnetic fluid contained between two infinite differentially heated non-magnetic plates in the presence of an oblique uniform external magnetic field is studied in zero gravity conditions. The thermomagnetic convection that arises is caused by the spatial variation of magnetisation occurring due to it...

The onset and decay of convection in a spherical cavity filled with ferromagnetic nanofluid and heated from below are investigated experimentally. It is found that, unlike in a single-component Newtonian fluid where stationary convection sets in as a result of supercritical bifurcation and where convection intensity increases continuously with the...

In-depth understanding and accurate modeling of the interaction between ocean spray and a turbulent flow under high wind conditions is essential for improving the intensity forecasts of hurricanes and severe storms. Here, the authors consider the E-epsilon closure for a turbulent flow model that accounts for the effects of the variation of turbulen...

Microbubble clustering may occur when bubbles become bound to targeted surfaces or are grouped by acoustic radiation forces in medical diagnostic applications. The ability to identify the formation of such clusters from the ultrasound echoes may be of practical use. Nonlinear numerical simulations were performed on clusters of microbubbles modeled...

In the oceanographic literature, short-crestedness of waves is often
assumed to be the same feature as directionality, as opposed to
long-crested waves which are unidirectional. Indeed, superposition of
linear long-crested waves will create an interference pattern of
modulated long crests. Lateral modulation of the long crests, however,
is also a n...

Infrared camera visualisation of convective flows in differentially heated vertical layers with the height-to-thickness ratios of 30 and 62.5 was used to demonstrate the influence of concentration stratification caused by gravitational sedimentation of magnetic particles and aggregates on the structure of convective motion. It is found that when a...

Flow patterns arising in a vertical differentially heated layer of nonconducting ferromagnetic fluid placed in an external uniform transverse magnetic field are studied experimentally and discussed from the point of view of the perturbation energy balance. A quantitative criterion for detecting the parametric point where the dominant role in genera...

A direct numerical simulation method is used to monitor the evolution of nonlinear random directional wave fields. The aim is to investigate the combined effect of high order nonlinearity and directional energy distribution on the statistics of wave orbital velocity. Results show that the development of modulational wave instability and the concurr...

The nonlinear dynamic behavior of microscopic bubbles near a rigid wall is investigated. Oscillations are driven by the ultrasonic pressure field that arises in various biomedical applications such as ultrasound imaging or targeted drug delivery. It is known that, when bubbles approach a blood-vessel wall, their linear dynamic response is modified....

Accurate modeling of sea spray under high-wind conditions is essential
for improving intensity forecast of hurricanes or severe storms. It has
been shown that the presence of water droplets in the vortex of
hurricane leads to a significant reduction in turbulent intensity and
consequently to a sharp flow acceleration. In this study, several
mathema...

Two mathematical models are proposed detailing the influence of ocean spray on vertical momentum transport under high-wind
conditions associated with a hurricane or severe storm. The first model is based on a turbulent kinetic energy (TKE) equation
and accounts for the so-called lubrication effect due to the reduction of turbulence intensity. The s...

Targeted ultrasound contrast agents are microbubbles that strongly scatter ultrasound, providing contrast on a scan, and have also been coated in molecules that adhere to target pathologies. The ultimate aim is to identify diseased tissue in clinical ultrasound practice. One issue is to discriminate in real time between microbubbles that have adher...

We consider oscillations of microscopic bubbles caused by the ultrasonic pressure field that arise in various biomedical applications such as ultrasound imaging or targeted drug delivery [1,2]. When bub-bles approach a blood-vessel wall, it is known to modify their dynamic response. The wall effects on small-amplitude oscillations of a big bubble h...

Mixed thermo-gravitational and thermo-magnetic convection in a vertical layer of non-conducting magnetic fluid is investigated. Various convection patterns found computationally are confirmed experimentally.

Nonlinear (non-Boussinesq) variations in fluid's density, viscosity, and thermal conductivity caused by a large temperature gradient in a flow domain lead to a wide variety of instability phenomena in mixed convection channel flow of a simple gas such as air. It is known that in strongly nonisothermal flows, the instabilities and the resulting flow...

We propose a comprehensive theoretical and experimental investigation (including ground-based studies and experiments conducted on board of the International Space Station) with the aim of understanding and quantifying transport properties of nonconducting ferroluids and physics of their flows. The specific emphasis is on using such fluids for safe...