Dr Ramachandra C G
@Presidency University
Associate Professor
Presidency University
Academic Professional with 22 years of Experience in Academic & Training, Research & Development and Academic Administration with B.E., M.Tech., Ph.D., Qualification.
EDUCATION
B.E, M.Tech, Ph.D
RESEARCH INTERESTS
Total Productive MaintenanceLean ManufacturingCondition MonitoringMaintenance ManagementCondition Based Maintenance
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
K. S. Lokesh, Thomas Pinto, D. Shrinivasa Mayya, C. G. Ramachandra, J. R. Naveen Kumar, and Raghavendra Pai
Springer Science and Business Media LLC
Bhavith K, Prashanth Pai M, Sudheer M, Ramachandra C G, Maruthi Prashanth B H, and Kiran Kumar B
MDPI
R. Gopal, K. Ananthakumar, and T. Arunnellaiappan
Springer Science and Business Media LLC
Praveen Kanti, V. Korada, C. Ramachandra and P. S. T. Sai
In the present study, the effect of temperature and volume concentration on thermal conductivity and density of water-based coal fly ash nanofluid for volume concentration range of 0–0.5% in temper...
M Vijayakumar, K Kumaresan, R Gopal, S D Vetrivel, and V Vijayan
Journal of New Materials for Electrochemical Systems
In this study, an attempt was made to develop and characterize Snake Grass Fiber (SGF)/Silicon Carbide (SiC)/epoxy and Snake Grass Fiber/Sisal Fiber (SF)/Silicon Carbide/epoxy hybrid composites using a compression moulding technique. Mechanical characteristics of the produced hybrid composites such as tensile, flexural, and hardness tests were analyzed. Also experiments have been carried out to predict the thermal stability of the fabricated composite samples. The interface between fiber and matrix was examined by using Scanning Electron Microscopy (SEM). Among SGF/SiC/epoxy and SGF/SF/SiC/epoxy composites, it has been observed that hybrid composite SGF/SF/SiC/epoxy exhibits the higher hardness of 82 Shore-D, tensile strength of 51 MPa and flexural strength of 73 MPa. In contrast to the mechanical properties, the percentage of water absorption was lower in the SGF/SiC/epoxy hybrid composite. It is proven from the results that the SGF/SF/SiC/epoxy hybrid composites will enhance the strength of the composites. This composite material is also a potential candidate for the hardware of energy devices including electrochemical energy along with Fuel Cell systems.
R. Gopal, K. Thirunavukkarasu, V. Kavimani, and P. M. Gopal
Springer Science and Business Media LLC
Praveen Kanti, K.V. Sharma, C.G. Ramachandra, and M Gurumurthy
IOP Publishing
Sandesh Hegde and C G Ramachandra
IOP Publishing
M J Raghavendra, C G Ramachandra, T R Srinivas, and M Prashanth Pai
IOP Publishing
Praveen Kanti, K.V. Sharma, C.G. Ramachandra, M Gurumurthy, and B M Raghundana Raghava
IOP Publishing
The current numerical study is aimed to examine the forced convection heat transfer of fly ash-Copper (80:20% by volume) water-based hybrid nanofluids flowing in a horizontal circular copper tube under a constant heat flux of 7962W/m2 using STAR CCM+ software. The volume concentrations of 0.5% and 1% are considered for the analysis within the Reynolds number range of 6900-26500. The findings show that the heat transfer coefficient and the Nusselt number of hybrid nanofluid at a concentration of 1 vol.% are increased by about 66.0% and 36.67% compared to that of water.
S Shashank, Thomas Pinto, C G Ramachandra, and M J Raghavendra
IOP Publishing
S.N Nagesh, G Manjunath, Putta Bore Gowda, CG Ramachandra, and S.N Nataraju
IOP Publishing
J. P. Rishi, C. G. Ramachandra, T. R. Srinivas, and B. C. Ashok
Springer Singapore
M. Prashanth Pai, C. G. Ramachandra, T. R. Srinivas, and M. J. Raghavendra
Springer Singapore
Praveen Kanti, Korada Viswanatha Sharma, Ramachandra C. G., and W. H. Azmi
Informa UK Limited
Abstract The heat transfer fluid's thermal properties are a significant topic of current research. In this study, coal fly ash nanoparticles of 14 nm average diameter were dispersed in water to prepare stable nanofluid in the concentration range of 0.1–0.5% volume concentration. The nanofluid was stabilized and uniformly dispersed using an ultrasonic homogenizer with the addition of Triton–X 100 surfactant. The thermophysical properties, viz., thermal conductivity, viscosity, density, and specific heat of the nanofluid were measured in the temperature range of 30–60 °C. The maximum thermal conductivity and viscosity augmentation of 14 and 6.38% are observed for 60 and 30 °C, respectively, at 0.5% volume concentration compared to water at the same temperatures. The experiment results revealed that thermal conductivity, viscosity, and density increased while specific heat decreased with an increase in nanofluid concentration. Also, the thermal conductivity and specific heat increase, while viscosity and density decrease with an increase in temperature. The thermal conductivity of fly ash nanofluid is observed to be superior by 3.9% compared to SiO2 nanofluid which can be due to its chemical constituents. Hence, fly ash particles are useful in heat transfer applications.
Praveen Kanti, K. V. Sharma, C. Ramachandra and Bhramara Panitapu
Praveen Kanti, K. V. Sharma, C. Ramachandra and A. Minea
Praveen Kanti, K. V. Sharma, M. Revanasiddappa, C. Ramachandra and S. Akilu
Praveen Kanti, K. V. Sharma, C. Ramachandra and M. Gupta
Abstract The article presents the heat transfer coefficient and the friction factor for the flow of water-base fly ash nanofluid in the concentration range of 0.5 to 2.0 vol%. Experiments are undertaken for flow in a horizontal copper tube subject to uniform heat flux in the Reynolds number range of 7000 to 45,200, for inlet fluid temperatures of 30, 45, and 60°C. The results revealed that in contrast to base fluid, nanofluids exhibit greater heat transfer coefficients which increase with concentration and fluid inlet temperatures due to augmentation in nanofluid thermal conductivity. The maximum amplification in Nusselt number and pressure drop of 67.4% and 11.9% are observed with 2% nanofluid concentration as compared to base liquid, for an inlet fluid temperature of 60°C and 30°C respectively. The values of Efficiency Index (EI) are evaluated for different concentrations and inlet fluid temperatures. Correlations are reported based on the experimental data for the estimation of dynamic viscosity, thermal conductivity, Nusselt number, and the friction factor of fly ash nanofluid.
Prashanth Pai Manihalla, Ramachandra Chamarajanagar Gopal, Yathin Krishna, and Anitha Kamath
AIP Publishing
Prashanth Pai Manihalla, Ramachandra Chamarajanagara Gopal, Srinivas Tirupathi Ranganatha Rao, and Rishi Jayaprakash
AIP Publishing
In the present technologically advanced business environment, industries need to adopt modern maintenance practices such as Total Productive Maintenance (TPM) to support their production facilities and systems. TPM is a Japanese philosophy which strives to improve the productivity of machines by reducing breakdowns, defects, accidents and wastes. It collaborates maintenance and production functions by the total participation of all the employees in an organization. This research work is carried out in Small and Medium Enterprises (SMEs) with the help of a questionnaire designed to investigate the usage and awareness level of TPM. The pre-set questionnaire is distributed to 150 different SMEs in India and 120 responses are received. These 120 responses are considered for the analysis. The respondents are randomly selected and they include chief executives, engineers, managers and supervisors. The responses obtained are rated on a five point Likert scale. This questionnaire based survey research also helps to study the influence of management factor in implementing TPM in the selected SMEs.
M. J. Raghavendra, C. G. Ramachandra, T. R. Srinivas, and M. Prashanth Pai
AIP Publishing
Tool wear is one in all the foremost necessary issues in cutting Ti alloys thanks to the high-cutting temperature and robust adhesion. Recently, the high-speed machining method has become a subject of nice interest for Ti alloys, not solely as a result of it will increase material removal rates, however, additionally as a result of it will completely influence the properties of the finished work piece. However, the method could lead to the rise of cutting force and cutting temperature which can accelerate tool wear. In this paper, turning experiments of Ti-6Al-4V alloy were conducted at high speeds using both uncoated and coated carbide tools. The obtained results show that the cutting force will increase considerably at higher cutting speed whether or not the cutter is an uncoated inorganic compound or TiN/TiAlN physical Vapour deposition (PVD)-coated inorganic compound. For uncoated carbide tools, the mean flank temperature is almost constant at a higher cutting speed, and no obvious abrasion wear or fatigue can be observed. However, for TiN/TiAlN PVD-coated carbide tools, the mean flank temperature always increases as the increase of cutting speed, and serious abrasion wear can be observed. In conclusion, the cutting performance of uncoated inserts is comparatively higher than TiN/TiAlN PVD-coated inserts at a better cutting speed.Tool wear is one in all the foremost necessary issues in cutting Ti alloys thanks to the high-cutting temperature and robust adhesion. Recently, the high-speed machining method has become a subject of nice interest for Ti alloys, not solely as a result of it will increase material removal rates, however, additionally as a result of it will completely influence the properties of the finished work piece. However, the method could lead to the rise of cutting force and cutting temperature which can accelerate tool wear. In this paper, turning experiments of Ti-6Al-4V alloy were conducted at high speeds using both uncoated and coated carbide tools. The obtained results show that the cutting force will increase considerably at higher cutting speed whether or not the cutter is an uncoated inorganic compound or TiN/TiAlN physical Vapour deposition (PVD)-coated inorganic compound. For uncoated carbide tools, the mean flank temperature is almost constant at a higher cutting speed, and no obvious abrasion wear or fa...
R. Gopal, K.R. Thangadurai, and K. Thirunavukkarasu
Elsevier BV
R. Gopal and K. Thirunavukkarasu
Elsevier BV