ravi babu sajja

@gmrit.edu.in

Associate Professor, Mechanical Engineering
GMR Institute of Technology

ravi babu sajja


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https://researchid.co/ravibabu.s
Babu is having more than 20 years of total experience.

EDUCATION

M.Tech, Ph.D

RESEARCH INTERESTS

Heat tansfer augmentation, nanofluids, convection heat transfer
22

Scopus Publications

151

Scholar Citations

8

Scholar h-index

5

Scholar i10-index

Scopus Publications

  • Experimental insights and analysis for enhancing the diesel engine performance with hybrid nano-enriched biodiesel blends
    Chiranjeeva Rao Seela, S. Ravi Babu
    Aip Conference Proceedings, 2025
  • Experimental investigation on thermophysical properties of MWCNT-Al2O3/ water hybrid nanofluid for enhanced heat transfer applications
    S. Ravi Babu, S. Chiranjeeva Rao, G. Sasikumar, M. Maruti Rao
    Aip Conference Proceedings, 2025
  • Synthesis of Hybrid Nanofluids, Properties, and Its Applications—A Comprehensive Review
    Sudhakara Rao Bammidi, Vijay Miditana, Ravibabu Sajja
    Lecture Notes in Mechanical Engineering, 2025
  • Effect of titanium dioxide nanoparticle concentration on the performance and emissions of a common rail direct injection engine with jute oil mahua ester biodiesel
    Sajja Ravi Babu, Prathipati Pradeep Kumar, Shaik Ahmed Basha, Marthati Maruthi Rao
    Ecological Engineering and Environmental Technology, 2025
    Research into sustainable and alternative fuel sources for internal combustion engines has accelerated due to ecological concerns and the reduction of fossil fuels. Common rail direct injection (CRDI) diesel engine running on jute oil mahua ester (JOME) biodiesel with titanium dioxide ( TiO 2 ) nano-additive is used to study the performance characteristics and emissions. Biodiesel derived from jute oil, a renewable and biodegradable source, was blended with varying concentrations of TiO₂ nanoparticles () to augment the efficiency of combustion and reduce emissions. Engine tests were con - ducted at different loads (0, 25, 50, 75, 100%) to evaluate brake thermal efficiency (BTE), brake specific fuel consump - tion (BSFC), and pollutants such as nitrogen oxides (NOₓ), carbon monoxide (CO), hydrocarbons (HC), and smoke opacity. Results indicated that the addition of TiO₂ nanoparticles improved combustion performance due to their cata - lytic properties and oxygen buffering capacity, leading to enhanced BTE and a notable decrease in CO and unburned hydrocarbons. However, a small rise in NOₓ emissions was detected, attributed to higher engine temperatures. Among the tested concentrations, B20+T50 ppm TiO₂ emerged as the optimal dosage, balancing improved performance and reduced emissions without causing injector clogging or adverse effects. Overall, the usage of TiO₂ nanoparticles in jute biodiesel (B20 blend) presents a promising pathway toward cleaner and more efficient engine operation. This aligns with global efforts to diminish greenhouse gas emissions and encourage sustainable energy solutions.
  • Thermophysical properties of MWCNT-Alumina/water nanofluid and their influence on the performance of free convection heat transfer
    International Journal of Advanced Technology and Engineering Exploration, 2024
    Thermal conductivity of the traditional fluids such as water, ethylene glycol (EG), propylene glycol (PG), and transformer oil is low compared to solids.So, these fluids offer less heat transfer performance.Choi [1] first coined the nanofluids by dispersing nanosized (< 100 nm) particles into the carrier fluid and observed the improved results.Nanofluids exhibit better thermophysical properties compared to conventional liquids.Among metallic, metallic oxide, and carbon-related materials, multi-walled carbon nanotubes (MWCNT) and Aluminum oxide (Al 2 O 3 ) are the two types of nanoparticles commonly used to synthesize nanofluids. *Author for correspondenceIt is difficult to comprehend how nanofluids behave and what effect they have on heat transfer processes.The behaviour of nanofluids is impacted by variables including particle size, concentration, and temperature, despite the fact that they have better thermal conductivity and other features [25].The overall efficacy of nanofluids in real-world applications can also be impacted by problems with nanoparticle stability and aggregation.The requirement for more efficient heat transfer strategies motivates the study of the thermophysical properties of MWCNT-Al 2 O 3 /water nanofluid and their impact on natural convection.A fundamental method of heat transmission that results from changes in fluid density brought on by temperature gradients is called natural convection.
  • Effect of Inclination and Thermoelectric Material on the Performance of Solar PV-Thermo Electric Cooling System
    Sajja Ravi Babu, Shaik Ahammad Basha, Gnanasekaran Sasikumar, Prathipati Pradeep Kumar
    Ecological Engineering and Environmental Technology, 2024
    Solar photovoltaic (PV) systems, coupled with thermo-electric cooling, have gained significant attention as an eco-friendly solution. To enhance energy efficiency and reduce the overall environmental impact of energy generation and consumption, it is a viable option. This study investigates the impact of critical parameters, namely inclination angle of solar panels, the type of material used in thermo-electric cooling modules, on the performance of a solar PV-thermo electric cooling system. In this research, the impact of inclination angles (15°, 20°, 25°) and two materials (Bismuth telluride and Peltium telluride) of thermoelectric were considered for this study. A comprehensive series of experiments were conducted to analyze the impact of varying inclination angles of the solar panels and material of thermoelectric cooler. The average incident irradiation, panel temperature and outpower of solar panel variation with time are presented. The optimum tilt angle of the solar panel is observed as 20° and material for thermoelectric cooler is Bismuth telluride. When using Bismuth telluride as a thermoelectric material with 20° tilt angle, the solar panel’s temperature decreases by 14% and its outpower is augments by a maximum of 14.5%. The results presented here offer practical guidance for system design and operation, ultimately promoting the widespread adoption of this technology in a more environmentally conscious manner.
  • Wastewater Treatment Technologies Selection Using Analytical Hierarchy Process and VIKOR Methods: A Case Study
    Gnanasekaran Sasikumar, A. Sivasangari, S. Ravibabu
    Nature Environment and Pollution Technology, 2023
    Due to the ever-increasing water scarcity problem across the globe, the treatment of wastewater is an important public health and socio-economic issue. Treating wastewater through proper technology is vital to protect the ecosystem from unsafe and contaminated matter available in wastewater. Identification of suitable wastewater treatment technologies is a complex Multi-Criteria Decision Making (MCDM) problem since it includes many conflicting assessment criteria. The objective of the paper is to construct an integrated model using the Analytical Hierarchy Process (AHP) and VIseKriterijumska Optimizacija I Kompromisno Resenje (VIKOR) for evaluating wastewater treatment technologies (WWTTs). AHP is applied to calculate criteria weights, and the VIKOR method is applied to prioritize and select the best WWTTs. The proposed model is applied to selecting the best WWTT among four alternatives and seven criteria. It is found that the proposed model yields better results when compared with other MCDM solutions.
  • Nanofluid selection for an automobile radiator using weighted sum model technique
    S. Ravi Babu, K. P. V. Krishna Varma, P. Ramesh Babu
    Aip Conference Proceedings, 2023
  • Experimental Investigation on Free Convective Heat Transfer Performance of Oxide Nanofluids Along a Vertical Cylinder
    S. Ravi Babu, P. Pradeep Kumar, S.A. Basha, M. Maruthi Rao
    Ecological Engineering and Environmental Technology, 2023
    The multi criterion decision making (MCDM) method and experimental investigation on free convective heat transfer performance of oxide-based water nanofluids along a vertical cylinder are the two methods used to com - pare the performance in this paper. Al 2 O 3 , CuO, TiO 2 , SiO 2 , Fe 3 O 4 , and ZnO were the metal oxide nanoparticles used in the study to make water-based metal oxide nanofluids with volume fractions ranging from 0% to 1%. Two step method was used to create nanofluids. Thermo-physical properties like density, specific heat, viscosity, and thermal conductivity were measured after the various nanofluids were synthesized. Then, the performance of each nanofluid was evaluated based on various attributes using the weighted sum model (WSM) method, and the rank - ing of nanofluids was given. To begin, water served as the medium for free convection heat transfer experiments to validate the experimental setup. Free convection heat transfer experiments were carried out using metal oxide-based water nanofluids as mediums at volume fractions ranging from 0% to 1% for various heat inputs in the range of 30 W and 50 W. The heat transfer coefficient augments with percentage volume concentration up to 0.1 % for all types of nanofluids and then decreases until it reaches 0.6% volume fraction. Al 2 O 3 -water nanofluid performs better than other metal oxide nanofluids in both WSM and experimental methods.
  • Wear Analysis of Iron Slag Reinforced Polyester Composites with Taguchi Optimization
    Nimmagadda Vijaya Kumar, Shaik Ahammad Basha, Chitikena Chaitanya Kishore, Potli Aswarthanarayana, Prathipati Pradeep Kumar, Marthati Maruthi Rao, Sajja Ravi Babu
    Ecological Engineering and Environmental Technology, 2023
    In this paper, the dry sliding wear behaviour of the polyester composite reinforced with iron slag as filler was studied experimentally. The Taguchi method-based experiments were carried on pin-on-disk wear test set-up. The control factors considered for studying wear rate were sliding velocity, slag percentage and normal load applied on the member with constant sliding distance. The output performance parameters considered were coefficient of friction and weight loss. From the analysis of variance (ANOVA), it was observed that coefficient of friction is sig - nificantly affected by normal load then followed by slag content and sliding velocity. Sliding velocity plays a vital role on the weight loss, then followed by slag content and normal load. The optimal factor combination obtained was sliding velocity = 50 cm/s, slag percentage = 30 % and normal load = 4 kg. The model was validated using the set of optimal factor combinations to conduct a confirmation experiment.
  • Artificial Neural Network Technique for Estimating the Thermo-Physical Properties of Water-Alumina Nanofluid
    Sajja Ravi Babu, K.P.V. Krishna Varma, Kunapuli Siva Satya Mohan
    Ecological Engineering and Environmental Technology, 2022
  • Recent developments in synthesis, characterization and boiling heat transfer of nanofluids - A Review
    S Ravi Babu, A Saras Chandra, P Ramesh Babu
    Iop Conference Series Materials Science and Engineering, 2021
  • Effect of moisture and sonication time on dielectric strength and heat transfer performance of transformer oil based Al2O3 nanofluid
    S. Ravi Babu, N.V.A Ravi Kumar, P. Ramesh Babu
    International Journal of Advanced Technology and Engineering Exploration, 2021
  • Experimental investigation of free connective heat transfer augmentation using transformer oil-Al2O3nanofluid
    S Ravi Babu, A Saras Chandra, P Ramesh Babu
    Iop Conference Series Materials Science and Engineering, 2020
  • Experimental investigation of radiator heat transfer efficiency using Water + Ethylene Glycol based Al2O3, SiC nanofluids
    S. SatyaPrasad, V. Rambabu, S. Ravibabu
    Iop Conference Series Materials Science and Engineering, 2020
  • Experimental investigation on natural convection heat transfer augmentation with vibration effect by using water-al2o3 nanofluid
    International Journal of Scientific and Technology Research, 2020
  • Buoyancy-induced natural convective heat transfer along a vertical cylinder using Water-Al2O3 nanofluids
    S. Ravi Babu, G. Sambasiva Rao
    Journal of Thermal Science and Engineering Applications, 2018
  • Experimental investigation on stability and dielectric break down strength of transformer oil based nanofluids
    Ravi Babu S., Sambasiva Rao G.
    Aip Conference Proceedings, 2018
  • Thermo-physical properties of water +ethylene glycol basedalumina nanofluids
    Journal of Mechanical Engineering Research and Developments, 2018
  • Thermal conductivity and viscosity of water and ethylene glycol blend based alumina Nanofluids - An experimental study
    Ravi Babu. S et al., Ravi Babu. S et al., and
    International Journal of Mechanical and Production Engineering Research and Development, 2017
  • Enhancement of heat transfer in shell and tube heat exchanger by using nano fluid
    V Rambabu et al., V Rambabu et al., and
    International Journal of Mechanical and Production Engineering Research and Development, 2017
  • Experimental investigation of natural convective heat transfer using water-Alumina nanofluid with taguchi design of experiments
    International Journal of Mechanical Engineering and Technology, 2017

RECENT SCHOLAR PUBLICATIONS

  • Experimental insights and analysis for enhancing the diesel engine performance with hybrid nano-enriched biodiesel blends
    CR Seela, SR Babu
    AIP Conference Proceedings 3298 (1), 030006 , 2025
    2025
  • Experimental investigation on thermophysical properties of MWCNT-Al 2 O 3 / water hybrid nanofluid for enhanced heat transfer applications
    SR Babu, SC Rao, G Sasikumar, MM Rao
    AIP Conference Proceedings 3298 (1), 040042 , 2025
    2025
  • Effect of titanium dioxide nanoparticle concentration on the performance and emissions of a common rail direct injection engine with jute oil mahua ester biodiesel
    SR Babu, PP Kumar, SA Basha, MM Rao
    Ecological Engineering & Environmental Technology 26 (6), 251-260 , 2025
    2025
    Citations: 1
  • The Impact of Virtual Influencers on Social Media: Driving Customer Engagement and Strengthening Brand Loyalty in the Indian Millennial Market
    S Basha
    Dragoman Journal of Translation Studies , 2025
    2025
    Citations: 7
  • Formative Learning Through a Spatial Visualization-Based Cadathon Contest
    GVSS Sharma, AL Naidu, K Santarao, BV Suresh, P Kumar, Y Shireesha, ...
    Journal of Formative Design in Learning 8 (2), 113-128 , 2024
    2024
  • EARLY-STAGE DETECTION OF ALZHEIMER’S DISEASE USING MODIFIED FIREFLY BASED ENSEMBLE CLASSIFICATION MODEL
    S LAKSHMI, S BABU
    INTERNATIONAL JOURNAL OF COMPUTER SCIENCE AND ENGINEERING 11 (11), 11-19 , 2024
    2024
  • Effect of Inclination and Thermoelectric Material on the Performance of Solar PV-Thermo Electric Cooling System
    SR Babu, SA Basha, G Sasikumar, PP Kumar
    Ecological Engineering & Environmental Technology 25 , 2024
    2024
    Citations: 1
  • Bridging the industry–academia gap: An experiential learning for engineering students
    GVSS Sharma, AL Naidu, KS Rao, BV Suresh, P Kumar, Y Shireesha, ...
    Journal of Formative Design in Learning 7 (2), 139-157 , 2023
    2023
    Citations: 4
  • Nanofluid selection for an automobile radiator using weighted sum model technique
    SR Babu, KPVK Varma, PR Babu
    3RD INTERNATIONAL CONFERENCE ON MANUFACTURING, MATERIAL SCIENCE AND … , 2023
    2023
    Citations: 2
  • Wear analysis of iron slag reinforced polyester composites with taguchi optimization
    N Vijaya Kumar, SA Basha, CC Kishore, P Aswarthanarayana, PP Kumar, ...
    Ecological Engineering & Environmental Technology 24 , 2023
    2023
    Citations: 3
  • Experimental investigation on free convective heat transfer performance of oxide nanofluids along a vertical cylinder
    S Ravi Babu, KP Pradeep, SA Basha, RM Maruthi
    Ecological Engineering & Environmental Technology 24 , 2023
    2023
    Citations: 3
  • Artificial neural network technique for estimating the thermo-physical properties of water-alumina nanofluid
    SR Babu, KPVK Varma, KSS Mohan
    Ecological Engineering & Environmental Technology 23 (2), 97-106 , 2022
    2022
    Citations: 14
  • Effect of moisture and sonication time on dielectric strength and heat transfer performance of transformer oil based Al2O3 nanofluid
    SR Babu, NVAR Kumar, PR Babu
    International Journal of Advanced Technology and Engineering Exploration 8 … , 2021
    2021
    Citations: 3
  • Comparison of Experimental and Computational Analysis of An Automobile Radiator Performance Using Alumina Nanofluids
    S Ravibabu
    Turkish Journal of Physiotherapy and Rehabilitation, 3100-3103 , 2021
    2021
    Citations: 1
  • Recent developments in synthesis, characterization and boiling heat transfer of nanofluids–A Review
    S Ravi Babu, A Saras Chandra, P Ramesh Babu
    IOP Conference Series: Materials Science and Engineering 1033 (1), 012072 , 2021
    2021
    Citations: 3
  • Experimental investigation of free connective heat transfer augmentation using transformer oil-Al2O3 nanofluid
    SR Babu, AS Chandra, PR Babu
    IOP Conference Series: Materials Science and Engineering 998 (1), 012022 , 2020
    2020
    Citations: 6
  • Comparative Analysis of Stability and Dielectric Break Down Strength of Transformer Oil Based Nanofluids
    SR Babu, PR Babu
    Int. J. Electr. Eng. Technol.(IJEET) 11 (5), 113-119 , 2020
    2020
    Citations: 3
  • Selection of a four wheel passenger car using AHP and TOPSIS approach—Indian Scenario
    SR Babu, V Manoj
    Int J Adv Sci Technol 29 (6), 5542-5548 , 2020
    2020
    Citations: 2
  • Experimental investigation of natural connective heat transfer augmentation with vibration effect
    SRB B.Sudhakar rao
    International Research Journal of Engineering and technology 6 (8), 1496-1503 , 2019
    2019
    Citations: 8
  • A case series of neuroendocrine carcinoma of the stomach
    RV Rao, S Brahamjit, S Babu
    J Med Sci Res 7 (2), 25-31 , 2019
    2019

MOST CITED SCHOLAR PUBLICATIONS

  • Effects of some parameters on thermal conductivity of nanofluids and mechanisms of heat transfer improvement
    SR Babu, PR Babu, V Rambabu
    Int. J. Eng. Res. Appl 3 (4), 2136-2140 , 2013
    2013
    Citations: 21
  • ENHANCEMENT OF HEAT TRANSFER IN SHELL AND TUBE HEAT EXCHANGER BY USING NANO FLUID
    SRB V.Rambabu, J.Ramarao
    International Journal of Mechanical and Production Engineering Research and … , 2017
    2017
    Citations: 17
  • Artificial neural network technique for estimating the thermo-physical properties of water-alumina nanofluid
    SR Babu, KPVK Varma, KSS Mohan
    Ecological Engineering & Environmental Technology 23 (2), 97-106 , 2022
    2022
    Citations: 14
  • EXPERIMENTAL INVESTIGATION OF NATURAL CONVECTIVE HEAT TRANSFER USING WATER-ALUMINA NANOFLUID WITH TAGUCHI DESIGN OF EXPERIMENTS
    GSR S.Ravi Babu
    International Journal of Mechanical Engineering and Technology (IJMET) 8 (7 … , 2017
    2017
    Citations: 12
  • Experimental investigation on natural convection heat transfer enhancement using transformer oil-TiO2 nanofluid
    MR Kiran, SR Babu
    IRJET 5 (7), 1412-1418 , 2018
    2018
    Citations: 10
  • Buoyancy Induced Natural Convective Heat Transfer along a Vertical Cylinder using Water/Al2O3 nanofluids
    RB Sajja
    Journal of Thermal Science and Engineering Applications 10 (3) , 2018
    2018
    Citations: 9
  • Experimental investigation of natural connective heat transfer augmentation with vibration effect
    SRB B.Sudhakar rao
    International Research Journal of Engineering and technology 6 (8), 1496-1503 , 2019
    2019
    Citations: 8
  • Optimization of Performance Parameters of a Diesel Engine fuelled with Biofuels
    SRB K.Prasada Rao,R.U.M.Rao, Dr.V.Rambabu
    International Journal of Thermal Technologies 3 (3), 85-91 , 2013
    2013
    Citations: 8
  • The Impact of Virtual Influencers on Social Media: Driving Customer Engagement and Strengthening Brand Loyalty in the Indian Millennial Market
    S Basha
    Dragoman Journal of Translation Studies , 2025
    2025
    Citations: 7
  • Experimental investigation of free connective heat transfer augmentation using transformer oil-Al2O3 nanofluid
    SR Babu, AS Chandra, PR Babu
    IOP Conference Series: Materials Science and Engineering 998 (1), 012022 , 2020
    2020
    Citations: 6
  • Bridging the industry–academia gap: An experiential learning for engineering students
    GVSS Sharma, AL Naidu, KS Rao, BV Suresh, P Kumar, Y Shireesha, ...
    Journal of Formative Design in Learning 7 (2), 139-157 , 2023
    2023
    Citations: 4
  • Thermo-physical Properties of Water +Ethylene Glycol based Alumina Nanofluids
    GSR S.Ravi Babu
    Journal of Mechanical Engineering Research and Developments 41 (1), 168-176 , 2018
    2018
    Citations: 4
  • Wear analysis of iron slag reinforced polyester composites with taguchi optimization
    N Vijaya Kumar, SA Basha, CC Kishore, P Aswarthanarayana, PP Kumar, ...
    Ecological Engineering & Environmental Technology 24 , 2023
    2023
    Citations: 3
  • Experimental investigation on free convective heat transfer performance of oxide nanofluids along a vertical cylinder
    S Ravi Babu, KP Pradeep, SA Basha, RM Maruthi
    Ecological Engineering & Environmental Technology 24 , 2023
    2023
    Citations: 3
  • Effect of moisture and sonication time on dielectric strength and heat transfer performance of transformer oil based Al2O3 nanofluid
    SR Babu, NVAR Kumar, PR Babu
    International Journal of Advanced Technology and Engineering Exploration 8 … , 2021
    2021
    Citations: 3
  • Recent developments in synthesis, characterization and boiling heat transfer of nanofluids–A Review
    S Ravi Babu, A Saras Chandra, P Ramesh Babu
    IOP Conference Series: Materials Science and Engineering 1033 (1), 012072 , 2021
    2021
    Citations: 3
  • Comparative Analysis of Stability and Dielectric Break Down Strength of Transformer Oil Based Nanofluids
    SR Babu, PR Babu
    Int. J. Electr. Eng. Technol.(IJEET) 11 (5), 113-119 , 2020
    2020
    Citations: 3
  • Radiation effects on MHD boundary layer flow of a nanofluid past an exponential permeable stretching sheet embedded in a porous medium
    M Lavanya, S Babu, RGM Venkata, S Suneetha
    Asian Journal of Science and Technology 7 (4), 2815-2824 , 2016
    2016
    Citations: 3
  • Experimental investigation of cooling performance of an Automobile radiator using Al2O3-Water+ethylene Glycol nanofluid
    SRB D.Tirupathi rao
    International Journal of Engineering Research and Development 11 (07), 28-35 , 2015
    2015
    Citations: 3
  • Nanofluid selection for an automobile radiator using weighted sum model technique
    SR Babu, KPVK Varma, PR Babu
    3RD INTERNATIONAL CONFERENCE ON MANUFACTURING, MATERIAL SCIENCE AND … , 2023
    2023
    Citations: 2