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Nikolaevich Rybyanets, Andrey
- Effects of Different Power High-intensity Ultrasonic Treatment on Rheological Properties of Heavy Oil Products
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Authors
Affiliations
1 Scientific Research Institute of Physics of the Southern Federal University
1 Scientific Research Institute of Physics of the Southern Federal University
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: The objective of this study is to investigate the effects produced by intensive ultrasound on rheological properties of oil and petroleum products, especially on heavy oil products with higher concentrations. Methods: Principal method of ultrasonic treatment is represented by the exposure to the highly intensive continuous ultrasound of different power during one and the same time of treatment. The basic objects of the investigation are represented by black oil grades M-100 and M-40. The relaxation of rheological properties of the objects of the investigation was observed over the period of 10 days upon ultrasonic treatment. Findings: As a result of the study the following regularities have been identified: considerable decrease in the substance viscosity after the treatment followed by the growth in the process of relaxation; in all cases the anomalous behavior of the substance viscosity has been observed in the process of relaxation; kinematic viscosity in all experiments did not reach its initial values that used to be measured before the treatment. This means that ultrasonic treatment is capable of reducing the viscosity of heavy oil products effectively over the period of time that is sufficient for producing the heavy grades of oil and for transportation of heavy oils and petrochemicals over considerable distances. Applications/Improvements: The results of this study can be used in oil extraction and refining industries in the processes of producing and transporting the heavy grade oils and petrochemicals.Keywords
Heavy Oil Products, High-intensity Ultrasonic Treatment, Rheological Properties.- Theoretical Calculations and Numerical Modeling of High Intensity Ultrasonic Fields for Optimization of High Intensity Focused Ultrasound Transducers
Abstract Views :141 |
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Authors
Andrey Nikolaevich Rybyanets
1,
Natalia Aleksandrovna Shvetsova
1,
Igor Aleksandrovich Shvetsov
1,
Oleg Anatolievich Sapozhnikov
2,
Vera Aleksandrovna Khokhlova
2
Affiliations
1 Scientific Research Institute of Physics of the Southern Federal University, Rostov-on-Don, Russia
2 Moscow State University, Moscow, Russia
1 Scientific Research Institute of Physics of the Southern Federal University, Rostov-on-Don, Russia
2 Moscow State University, Moscow, Russia
Source
Indian Journal of Science and Technology, Vol 9, No 42 (2016), Pagination:Abstract
Objectives: This work focuses on development of the mathematical models and theoretical research of the ultrasound ablation system in respect of the calculation of High Intensity Focused Ultrasonic Fields and modeling of biological tissue heating. Methods: Theoretical calculations of acoustic fields in linear approximation were made using Rayleigh integral. For description of nonlinear High Intensity Ultrasonic Fields, finite-difference modeling of Westervelt and Khokhlov–Zabolotskaya–Kuznetsov (KZK) equations were used. Findings: Theoretical and numerical models of High Intensity Focused Ultrasound (HIFU) Transducers were developed. The results of theoretical modeling of HIFU Transducers were presented. The characteristics of High Intensity Ultrasonic Fields, including the acoustic pressure, intensity and heat sources at different excitation modes of Ultrasound Transducers were calculated. Numerical solutions of the Khokhlov–Zabolotskaya–Kuznetsov (KZK) parabolic equation were obtained for nonlinear Focused Ultrasonic Fields. The obtained results were discussed. Applications/Improvements: The obtained results can be used in the development of HIFU Transducers for Medical Ultrasound Ablation Complexes, for the treatment of socially significant diseases.Keywords
Acoustic Pressure, HIFU, Numerical Modeling, Nonlinear Fields, Transducers, Ultrasound.- Anomalous Viscosity of High-Molecular Petroleum Fractions in Process of Relaxation after High- Intensity Ultrasonic Treatment
Abstract Views :146 |
PDF Views:0
Authors
Affiliations
1 Scientific Research Institute of Physics of the Southern Federal University, Rostov-on-Don, RU
1 Scientific Research Institute of Physics of the Southern Federal University, Rostov-on-Don, RU