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Verma S.,Sudan University of Science and Technology | Jadon V.K.,Rayat Bahra Institute of Engineering and Nano Technology | Gupta K.D.,Sudan University of Science and Technology
Industrial Lubrication and Tribology | Year: 2011

Purpose - The paper seeks to study, theoretically, the performance characteristics of capillary compensated multi-recessed hydrostatic journal bearings operating with micropolar lubricant. The finite element method is used to solve the modified Reynolds' equation governing the micropolar lubricant flow in the clearance space of a hydrostatic journal bearing. The performance characteristics of bearing operating with micropolar lubricant are presented and compared with that of Newtonian lubricant, for a wide range of non-dimensional load, capillary restrictor design parameter and micropolar parameters. Design/methodology/approach - The modified Reynolds' equation governing the flow of the micropolar lubricant is solved along with restrictor flow equation by finite element method so as to obtain fluid-film pressures. The iterative procedure is repeated until the converged solution for the fluid-film pressure field is obtained. Findings - A study of four-pocket hydrostatic journal bearing system capillary compensated and operating with micropolar lubricant is presented. The following conclusions are made from the results presented in this study: At a constant load, pocket pressures and minimum film thickness, stiffness coefficients and, the damping coefficients increase with increase in micropolar effect of lubricant as compared to the Newtonian lubricant; the influence of the micropolar parameters of lubricant is more significant upon the minimum fluid-film thickness at higher values of load and lower values of restrictor design parameter; the non-dimensional flow decreases with increase in the micropolar effect of the lubricant a given values of restrictor design parameter and load; and the stiffness coefficient in the direction of load is found to be influenced by the micropolar parameters and more significantly at lower values of restrictor design parameter and load. Originality/value - Studies of capillary compensated multi-recess hydrostatic journal bearing operating with micropolar fluid/lubricant are not available in the existing literature to the best of authors' knowledge. Although, such bearing has been studied with Newtonian lubricant and available in open literature. Therefore, this paper is an original piece of work in the area of micropolar lubrication and compensated hydrostatic bearings. © Emerald Group Publishing Limited. Source


Bhatia K.S.,Rayat Bahra Institute of Engineering and Nano Technology | Kaler R.S.,Thapar University | Kamal T.S.,DIET | Randhawa R.,Punjabi University
Journal of Optical Communications | Year: 2012

This paper forces on the monitoring and compensation of optical telecommunication channels by using Optical add drop multiplexers (OADM) in an Optical orthogonal frequency division multiplexing (OOFDM) system. An adaptive fiber nonlinearity precompensation (AFNP) scheme is also proposed to solve the fiber nonlinearity in coherent optical orthogonal frequency division multiplexed networks (CO-OFDM). Optical performance monitoring (OPM) at end-terminals is applied to channel identification in this paper. It is considered to be high efficiency and a cost efficient technique in low-dynamic system. Copyright © 2012 De Gruyter. Source


Singh J.,Rayat Bahra Institute of Engineering and Nano Technology
Indian Journal of Environmental Protection | Year: 2013

Abrupt urbanization, motorization as well as population growth have made urban environment difficult and challenging for cities as well as for the small towns. Proper planning and rational spatial planning plays an important part for building good environment for the cities, which provides legal framework for future development trends. In this study, Hoshiarpur city located in Punjab State of India has been selected to study vehicular traffic noise level. This study shows the vehicular traffic noise level measure at various locations in the city, Hoshiarpur along road side at day time peak hour's, that is from 10:00 AM to 2:00 PM. The research aims to find out sustainable development framework to reduce vehicular noise pollution in Hoshiarpur city. The road traffic noise level data was collected by using digital sound level meter (407730) and verified by using application in an Apple l-phone 4S through survey. Minimum and maximum traffic noise level were 68 dB (A) and 105 dB (A), which was recorded at various locations in this study. The results will be useful in planning, development and implementation of sustainable road transportation in the city. © 2013 - Kalpana Corporation. Source


Bhatia K.S.,Rayat Bahra Institute of Engineering and Nano Technology | Kaler R.S.,Thapar University | Kamal T.S.,DIET | Randhawa R.,Punjabi University
Optik | Year: 2013

In this paper, we first present the concept of adding and dropping the signals by using optical add drop multiplexers (OADMs) in an optical orthogonal frequency division multiplexing (OOFDM) system. We then demonstrated the transmission performance through simulation for Integrated Dense Wavelength Division Multiplexing and Optical-OFDM system with OADM including the fiber nonlinearity effect. The results show that system Q is about 18 dB for this system when operating at 9.953 Gb/s in standard-single-mode-fiber without dispersion compensation up to 4500 km distance. Signal evolution is also remarkable if system is operated at a frequency of 191.151 THz and Relative Intensity to Noise ratio (RIN) adjusted to -155 dB/Hz. © 2012 Elsevier GmbH. All rights reserved. Source


Bhatia K.S.,Rayat Bahra Institute of Engineering and Nano Technology | Kamal T.S.,Radiant Institute of Technolohy
Optik | Year: 2013

In this paper, we demonstrated the transmission performance through simulation for integrated dense wavelength division multiplexing and Optical-OFDM system with OADM including the fiber nonlinearity effect. The effects on transmitted channels, fiber link length, operating optical signal wavelength, optical transmitted signal power, optical signal bandwidth, transmission bit rate, optical received power and bit error rate at the receiving side are observed. © 2012 Elsevier GmbH. Source

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