PHV SESHA TALPA SAI
@mrcet.ac.in
Professor and Dean Research and Development
Malla Reddy College of Engineering and Technology
Scopus Publications
Scholar Citations
Scholar h-index
Scholar i10-index
Scopus Publications
P. H. V. Sesha Talpa Sai, Nandakishore Anand, Akuthota Viswajeeth, M. S. Nirmal Raj, R. Ajith Raj, and Potnuru Srikar
Springer Nature Singapore
M. Sucharitha, P. H. V. Sesha Talpa Sai, Subeesh Kopiyil Thazha, Mathew Thomas, Basavaraj Hunagund, and V. G. Krishna Anand
Springer Nature Singapore
R. Ajith Raj, P. H. V. Sesha Talpa Sai, Alimelugari Gurudutta, Ryali Venkata Nava Sarathy Prasad, Arjun Prakash Sharma, and Potnuru Srikar
Springer Nature Singapore
M. Mohammed Mohaideen, P.H.V. Sesha Talpa Sai, R. Ajith Raj, and V.G. Krishna Anand
MAFTREE
The Fibre Reinforced Composite (FRC) material consists of building materials in macroscopic level by having fibres and resin as reinforcement and matrix material respectively. It has different physical and chemical properties that were bonded together in order to get new material with different required characteristics from individual components. The properties of the composites are largely depending on the matrix and reinforcement materials. The matrix strengthening process by introduction of fine nano particles in composite laminate was done in this work. In order to study the effect of nano particles, the composite consists of Kevlar- 49 (K49) fibre in woven form with epoxy resin as matrix was considered. All the test specimens have been prepared with 12 layers of K49 to build 3mm thickness using vacuum bag moulding method. The K49 fibre in form of plain-woven type were chosen as reinforcement material. The nano fillers such as Titanium dioxide (TiO2), Calcium Carbonate (CaCO3) and Graphite powder (Gr) were used as nanomaterial added in the matrix and was compared with pure K49 reinforced composites for better performance. The TiO2, CaCO3 and GR nano fillers were constituted on various weight ratios in FRC. The structural properties like compression and shear strengths were determined as per ASTM standards. The fracture behaviour for all the categories of laminate has been detailed and reported using scanning electron microscope.
M. L. R. Chaitanya Lahari, P. H. V. Sesha Talpa Sai, K. V. Sharma, K. S. Narayana Swamy, P. Haseena Bee, and S. Devaraj
AIP Publishing
P. H. V. Sesha Talpa Sai, M. L. R. Chaitanya Lahari, K. V. Sharma, and K. S. Narayanaswamy
Wiley
Three concentrations of 0.2, 0.6, and 1.0 vol.% Copper/25 nm and silica/22 nm nanofluids are prepared in a base liquid glycerol–water mixture of 30:70 ratio by volume (GW70). The thermophysical properties of Cu and SiO2 nanofluids are determined with a TPS500S hot disc thermal analyzer and Brookfield viscometer in the temperature range of 20–80°C. The maximum enhancement in Cu and SiO2 nanofluid viscosity (63.4%, 35.7%), thermal conductivity (100.4%, 71.3%), and density (7.5%, 1.5%) while specific heat (7.8%, 2.3%) determined for 1.0% concentration at 80°C compared to base liquid GW70. Heat transfer experiments are conducted in a short‐length double pipe heat exchanger. The flow rates resulted in the lamifnar entry length region. A maximum enhancement in the overall heat transfer coefficient (HTC; 25.0%, 19.7%) and convective HTC (46.2%, 34.8%), respectively for Cu and SiO2 nanofluids is estimated at 1.0% concentration compared to base liquid at a bulk temperature of 35°C.
M.L.R. Chaitanya Lahari, P.H.V. Sesha Talpa Sai, K.V. Sharma, and K.S. Narayanaswamy
Elsevier BV
PHV Sesha Talpa Sai, Amiya Bhaumik, Gokul Prasad, Jain Joseph, James KJ, and M. Sucharitha
IEEE
Multiple input multiple output (MIMO)methodology is a promising advancement for fifth era (5G) cellular communications. MIMO has gotten a fundamental component of remote correspondence standard including IEEE 802.11N (Wi-Fi), HSPA+ (3G), Wi-MAX (4G) and long-haul evolution (LTE 4G). MIMO accomplishes space estimations to improve remote frameworks limit, range and dependability. In this technology, every cell has a base station (BS) with countless antennas, permitting the synchronous utilization of similar resources by different users of a cell. In this way, huge MIMO frameworks can bring high spectral and power efficiencies. In any case, this innovation faces some significant issues that should be tended to. One of the primary issues is the performance corruption which is because of various noises. In this paper, performance of the framework is evaluated utilizing Bit Error Rate (BER) for noises as AWGN (Additive White Gaussian Noise), phase noise with Quadrature Phase Shift Keying (QPSK) transmitter and receiver and Orthogonal Space-Time Block Code (OSTBC).
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. L.R. Chaitanya Lahari, P.H.V. Sesha Talpa Sai, K.V. Sharma, K.S. Narayanaswamy, P.Haseena Bee, and S. Devaraj
IOP Publishing
Abstract Convective and overall heat transfer coefficients of SiO2 nanofluid flowing in a concentric DTHE are determined experimentally. The tests are carried out in the 800<Re<1900 range using SiO2/22nm nanofluids prepared in 0.2, 0.6 and 1.0% volume concentrations in 30:70 ratio glycerol-water mixture base liquid. The thermal and physical properties of silica nanofluids are determined in the range of 20-80°C. Viscosity, thermal conductivity, and density of nanofluids increased with particle concentration whereas specific heat decreased. Thermal conductivity and specific heat of nanofluids increased with temperature while viscosity and density decreased. Heat transfer experiments are conducted using nanofluids at a bulk temperature of 35°C in a laminar developing flow region. Overall heat transfer coefficient and convective HTC of 1.0% silica nanofluids are increased by 21.2 and 36.3% compared to base liquid.
P. Haseena Bee, S. Devaraj, M. L. R. Chaitanya Lahari, P. H. V. Sesha Talpa Sai, and K. S. Narayanaswamy
AIP Publishing
D. Prasuna Lilly Florence, P. H. V. Sesha Talpa Sai, S. Devaraj, and K. S. Narayanaswamy
AIP Publishing
The current investigation is aimed to give a thorough explanation of metal matrix composite fabrication by taking different combinations of the reinforcements by using the principles of friction stir technique and impact of the input processing parameters on mechanical properties done by the different researchers. The researchers attempted to actuate a relation between the input process parameters and their output responses. Friction stir welding and processing method uses significantly less energy. For many engineering applications the metal matrix composites replaces the regular used materials because of its unique mechanical and metallurgical properties, stability, durability, resistance to corrosion. The process parameters includes rotational speed, tilt angle, feed and deposition rate have major impact on mechanical properties of fabricated composite surfaces by the friction stir process. The solid state nature of processing method is brought out the enhancement in different properties in surface composites. The pin profile is also having major impact on mechanical properties. The different pin profile generally used are triangular, cylindrical, hexagonal and pentagon. The present study can give a concept of defect free weld having higher and improved mechanical properties on surface composites.
Prasuna Lilly Florence, K.S. Narayanaswamy, P.H.V. Sesha Talpa Sai, and S. Devaraj
Elsevier BV
P. Nagaraju, M. Ravichandra, M L R Chaitanya Lahari, and P H V Sesha Talpa Sai
Springer Singapore
M.L.R. Chaitanya Lahari, P.H.V. Sesha Talpa Sai, K.S. Narayanaswamy, P. HaseenaBee, S. Devaraj, and K.V. Sharma
Elsevier BV
M L R Chaitanya Lahari, P H V Sesha Talpa Sai, K S Narayana Swamy, N. KrishnaMurthy, and K.V. Sharma
IOP Publishing
Nanofluids in heat transfer applications exhibit effective performance over conventional heat transfer fluids. High thermal loads due to miniaturization in a wide variety of applications offers technological challenges in designing efficient thermal management systems. Traditional heat transfer fluids such as air, water, engine oil, and ethylene glycol (EG) have very low thermal conductivities of 0.03, 0.613, 0.145 and 0.253 W/mK respectively. The poor thermal conductivity of these fluids is an obstacle in improving heat transfer and compactness of the heat exchangers. Determination of properties of nanofluids and its performance in water based base fluids has been studied by many researchers. However the heat transfer performance of mixed nanofluids ie., hybrid nanofluids is yet to be explored. TiO2 and ZnO nanofluids were prepared at 0.5%, 1.5% and 2.0% volume concentration. Thermal conductivity estimated for temperature range of 30-70°C. Significant enhancement of both heat transfer rate and effectiveness of heat exchanger was noticed with TiO2 nanofluids at 2.0% volume concentration and with 1.5% volume concentration of TiO2-ZnO hybrid nanofluids.
P.H.V. Sesha Talpa Sai, K.V. Sharma, Devarayapalli K.C., and J.V. Ramana Rao
Elsevier BV