Dr. Naveen Sharma
@nsut.ac.in
Assistant Professor, Mechanical Engineering And Electrical Vehicle (West Campus)
Assistant Professor, Mechanical Engineering (Main Campus)
Netaji Subhas University of Technology, New Delhi
RESEARCH, TEACHING, or OTHER INTERESTS
Mechanical Engineering, Renewable Energy, Sustainability and the Environment, Engineering
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
Trinath Mahala and Naveen Sharma
Elsevier BV
Naveen Sharma, Sunil Baloda, and Nazrul Islam Khan
CRC Press
Naveen Sharma, Noushad Shaik, Vivek Kumar, and Mukesh Kumar
CRC Press
Naresh Yarramsetty, Naveen Sharma, and Modumudi Lakshmi Narayana
Emerald
Purpose This study aims to investigate the effect of porous material (clay pots) and it is facing on the productivity performance of a pyramid type solar still. The clay pots are placed in the basin facing up and facing down. The numbers of clay pots considered were 9 and 25, and its performance was compared with normal (0 clay pots) solar still. Design/methodology/approach The pyramid solar water distillation system has been designed, fabricated and tested under the actual environmental conditions of Kanchikacherla (16.6834 0N, 80.3904 0E), Andhra Pradesh, India. The solar still is used to produce the fresh water and hot water simultaneously from the brackish (i.e. containing dissolved salts) feed water for domestic applications. From open literature, it was established that the rate of evaporation is higher when the flowing water is held for a longer duration on the black color absorber plate, thereby leading to an increase in productivity of freshwater. Therefore, the pyramid solar still has been tested for smooth absorber plate and the absorber plate with porous heat storage material. Findings The porous material increases the production rate of freshwater compared to a base plate. However, the pyramid still with clay pots has higher productivity at a lower temperature because of the porosity effect. Originality/value The total dissolved solids, electrical conductivity and pH of the distilled water and the saline water have also been measured and compared.
Sunil Baloda, Manoj Kumar Soni, and Naveen Sharma
SAGE Publications
Limited availability of conventional energy sources and the problems of environmental degradation associated with them compels the need for a supply of new sustainable energy options. Among renewable energy sources, solar thermal energy is the most abundantly available and feasible option for electricity generation. Solar-thermal-only plants have a very high initial investment and, due to the sporadic nature of solar energy, can be operated only during the daytime. This limitation of only solar-thermal plants leads to an innovative idea of combining solar energy with coal-based power plants. This study investigates the hybridization of an existing 660 MW power plant with concentrated solar thermal energy on technical, environmental, and economic criteria under three different replacement options. The results obtained using MATLAB Simulink (R2017a) showed that the cycle efficiency increases from base case cycle efficiency, that is, 41.74% to 44.36%, 47.41%, and 48.72%, respectively, for all three replacement options. The economic analysis showed that the levelized electricity cost (cents/kWh) for all three replacement options is 4.56, 4.69, and 4.82, respectively. The payback period (years) is found as 3.3, 3.7, and 3.9, respectively. The environmental factors such as annual reductions in coal usage and CO2 emissions, and solar contribution are also calculated. The outcomes of this research will help to reduce global warming and climate mitigation.
Naveen Sharma, Shaik Noushad, G. Siva Ram Kumar Reddy, and Ajit
Springer Nature Singapore
Sahil Chauhan, Kunal Gaur, Ajit, and Naveen Sharma
Springer Nature Singapore
Sunil Baloda, Manoj Kumar Soni, and Naveen Sharma
Informa UK Limited
Atul Kumar Singh, Vivek Kumar, Simran Jeet Singh, Naveen Sharma, and Divya Choudhary
Emerald
Purpose An electrorheological (ER) fluid comprises dielectric particles suspended in an insulating viscous medium. ER lubricants are considered smart lubricants. They have been applied in hydraulic valves, power transmission devices and damping systems. The purpose of this study is to investigate the performance of hydrostatic thrust bearing operating with ER lubricant. Design/methodology/approach Reynold’s equation was used to model the flow of the ER lubricant in the bearing. The continuous Bingham model was used to express the viscosity of the ER lubricant as a function of yielding stress, applied electric field and shear strain rate. The Reynolds equation is solved using the finite element method (weighted residual approach) to compute the film pressure as a primary variable and the lubricant flow rate, load-carrying capacity, stiffness and damping parameters as associated performance indices. Findings The effects of the pocket shape, compensating elements and ER lubricant on the bearing performance were investigated. The application of ER lubricant significantly enhanced the load-carrying capacity (48.2%), stiffness (49.8%) and damping (4.95%) of the bearings. Circular and triangular pocket bearings with constant-flow valves have been reported to provide better steady-state and rotor-dynamic performances, respectively. Originality/value This study presents the effect of an ER lubricant on the rotor-dynamic performance of hydrostatic thrust bearings with different pocket shapes.
Rajesh Choudhary, Naveen Sharma, and Sudhakar Subudhi
Emerald
Purpose This study aims to deal with the optimization of experimental parameters to obtain maximum heat transfer rate in a Rayleigh–Bénard enclosure filled with the water-based Al2O3 nanofluids using the Taguchi method. Design/methodology/approach The particle size and particle concentration of the Al2O3 nanoparticles are 40 nm and 0.01 Vol. %, respectively. A two-step approach has been used to prepare the nanofluids of the required concentration by mixing the nanoparticles in the distilled water (DW). A Rayleigh–Bénard enclosure, having a hot bottom and a cold top copper plate with insulated side walls, is used for the experiments. Experiments have been conducted first with the DW, for the validation of experimental facility, and second with nanofluid (Al2O3 + DW), for the heat transfer improvement, at three different values of enclosure aspect ratios (ratio of height to width of an enclosure), i.e. 0.5, 1.0 and 1.5. Findings Signal-to-noise ratio (SNR) analysis has been used to determine the optimal levels of design parameters and their contribution toward heat transfer augmentation. The heat transfer, i.e. Nusselt number, is determined for L9 (33) orthogonal array designed by Taguchi method along with corresponding SNR values. The SNR values are plotted for DW and nanofluid to study the effect of different parameters and to identify their optimal levels. It was found that the aspect ratio has the maximum contribution ratio of 78% for the nanofluid and 76.12% for the DW, followed by the heat flux and the height. Originality/value The present results demonstrated the great reliability of the Taguchi method in the optimization of the thermal system to save the time and cost of experiments.
Anuj Kumar Mishra, Ajay Kumar, Himanshu Tripathi, Naveen Sharma, Sumit Kanchan, and Rajesh Choudhary
Springer Singapore
Naveen Sharma, Shaik Noushad, and G. Siva Ram Kumar Reddy
Springer Singapore
Mukesh Kumar, Ravindra Kumar, Yogesh Tak, Ravindra Kumar Meena, Naveen Sharma, and Ashiwani Kumar
SAGE Publications
In this research work, designing and fabrication of hybrid epoxy polymer composite materials had been carried out. It consists of basalt fiber (constant fraction) and marble dust particulates (0–10 wt% @ step of 2.5%) ensuing five compositions namely, MBE-0, MBE-2.5, MBE-5, MBE-7.5, and MBE-10. The specimen’s undergone physical, mechanical, and thermo-mechanical characterizations followed by three-body abrasive wear performance evaluation. Parametric optimizations of the wear have been evaluated with the Taguchi technique. The performance data are used to rank the compositions using a hybrid AHP-VIKOR selection making tool. It has been observed that voids content improves with reinforcement up to 5 wt% marble dust reinforcement, thereafter, it deteriorates sharply. The mechanical properties with 5 wt% marble dust reinforcement found to be highest. The thermo-mechanical characteristics like modulus and damping improve with marble dust reinforcement and temperature. The Cole-Cole plots reveal the heterogeneity present in the composites. The Taguchi’s analysis reveals the order of operating factors influencing specific wear rate as abrading distance > normal load > reinforcement composition > abrasive size. The steady state-specific wear rate of the composites reveals decremented rate across the abrading distance range irrespective of reinforcement proportions and at any specific abrading distance the order it followed as MBE-5 < MBE-7.5 < MBE-2.5 < MBE-10 < MBE-0. The ranking analysis using hybrid AHP-VIKOR technique predicts the ranking sequence as MBE-5 > MBE-7.5 > MBE-2.5 > MBE-10 > MBE-0, which are in-line with subjective analysis.
Naveen Sharma, Andallib Tariq, and Manish Mishra
ASME International
Abstract This study aims to understand the effect of flow structures within the inter-rib regions of a novel permeable rib configuration in vertical and horizontal streamwise planes upon surface heat transfer parameters. In this investigation, the liquid crystal thermography (LCT) and particle image velocimetry (PIV) are used to extract the local heat transfer and flow-field information, respectively. The effect of slit-converging angle (ϕ = 0 deg, 5 deg, 10 deg, and 15 deg) are examined at a typical Reynolds number of 42,500 and relative rib pitch ratio of 10. Surface- and spanwise-average and overall augmentation Nusselt numbers are obtained along with the pressure drop measurements. Flow-field experiments are performed in both vertical and horizontal streamwise planes, and the results are expressed in terms of mean velocities, stream traces, turbulent statistics, coherent structures, and turbulent kinetic energy budgets. Critical points are also identified on the basis of critical point theory, which provides evidences of the different flow phenomena accountable for enhance mixing between the ribs. The secondary flow coming from the slit shows three-dimensionality in the flow resulting to higher turbulence intensity and rotational motion (say higher turbulent mixing), and thereby leading to high heat transfer just behind the permeable rib. The permeable ribs are also helpful in the reduction of friction factor by 32% with a typical ϕ value of 5 deg, compared to solid ribs, while the thermohydraulic performance increases with increasing ϕ from 0 deg to 15 deg up to 21%. The pentagonal ribs with convergent slit provide comparable or better performance among the permeable rib geometries used in the pertinent literature.
Naveen Sharma and Rajesh Choudhary
Springer Singapore
Naveen Sharma, Andallib Tariq, and Manish Mishra
Begell House
Md Shaukat Ali, Naveen Sharma, and Andallib Tariq
Springer Science and Business Media LLC
Naveen Sharma, Andallib Tariq, and Manish Mishra
Informa UK Limited
ABSTRACT Rib turbulators are extensively used in augmentation of convective heat transfer in several applications related to heat exchange and cooling in thermal energy systems. Present experimental investigation examines the local heat transfer and friction factor characteristics of pentagonal ribs mounted on bottom heated wall of a rectangular channel. The emphasis is towards assessing and analysing the potential impact of varying chamfering angle (0 to 20°) and rib pitch to height ratio (6 to 12) on the overall heat transfer enhancement and its distribution on the surface. Experiments are performed at different Reynolds numbers ranging from 9400 to 58850. Liquid crystal thermography is applied to measure surface temperature distribution and finally to demonstrate the local heat transfer coefficient over the ribbed surface. The results depict that the local augmentation Nusselt number distribution is axisymmetric and shows 2-dimensionalty in heat transfer distribution. Pentagonal ribs show a significant improvement for the low heat transfer zones in leeward vicinity of the square rib, specially prominent at higher Reynolds number, and therefore seen as the potential benefit in terms of obviating the hotspots. It is observed that the pentagonal ribs lead to superior heat transfer enhancement in conjunction with significant reduction in pressure penalty as compared to square ribs and thus ensures an enhanced thermo-hydraulic performance.
Naveen Sharma, Andallib Tariq, and Manish Mishra
Begell House
Naveen Sharma, Md Shaukat Ali, Andallib Tariq, and Manish Mishra
Informa UK Limited
ABSTRACT Liquid crystal thermography and pressure drop measurements have been carried out to study the heat transfer and frictional characteristics in a rectangular duct with solid ribs (C1), converging slit-ribs (C2), and alternate solid-slit ribs (C3) mounted transversely on the bottom wall, where C2 carries a continuous converging-slit in the flow direction. Effect of rib configurations, and rib pitch to height ratios (6, 8, 10, and 12) has been investigated at Re of 9400, 26160, 42500, and 58850. Results show that converging-slit considerably enhances the heat transfer rate in the downstream vicinity, and help in obviating the local hot spot formation. Abbreviations: LCT: Liquid crystal thermography; HTC: Heat transfer coefficient; LHI: Laser holographic interferometry; NST: Naphthalene sublimation technique; IR: Infrared; TPF: Thermo-hydraulic performance; PIV: Particle image velocimetry.
Naveen Sharma, Andallib Tariq, and Manish Mishra
Elsevier BV
Andallib Tariq, Naveen Sharma, and Manish Mishra
ASME International
This work is an experimental study of detailed aerothermal characteristics inside a duct carrying an array of solid and permeable pentagonal ribs with a parallel and inclined slit, mounted on the bottom wall. The rib height-to-hydraulic diameter ratio, the rib pitch-to-height ratio, and the open area ratio fixed during experiments are 0.125%, 12%, and 25%, respectively. The heat transfer coefficient (HTC) distribution is mapped by using transient liquid crystal thermography (LCT), while the detailed flow measurements are performed by using particle image velocimetry (PIV). The primary focus of the study is to assess the influence of inter-rib region flow characteristics on the local heat transfer fields. The heat transfer and friction factor measurements are evaluated along with thermohydraulic performances at different Reynolds numbers, i.e., 26,160, 42,500, and 58,850. Performance indexes show that the pentagonal ribs with the inclined-slit are superior to other configurations from both perspective. Aerothermal features within inter-rib region were elucidated by analyzing the time-averaged streamlines, mean velocities, fluctuation statistics, vorticity, turbulent kinetic energy (TKE) budget terms, and local and spanwise-averaged Nusselt number as well as augmentation Nusselt numbers. Critical flow structures and coherent structures were identified, which illustrate about different flow dynamic processes. The flow emanating out of the inclined-slit pentagonal rib significantly affects the magnitude of streamwise velocity, fluctuation statistics, vorticity, and TKE budget terms at the downstream corner, whereas the dissipation term of TKE budget correlates well with the surface heat transfer distribution.
Naveen Sharma, Andallib Tariq, and Manish Mishra
Elsevier BV