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Belgaum, India

Visvesvaraya Technological University is a collegiate public state university in Karnataka State, India. It was established on 1 April 1998 by the Government of Karnataka as per VTU Act 1994, to improve the quality of technical education in the state. Apart from a few notable exceptions, VTU has complete authority in the state of Karnataka. It is a statutory requirement for colleges offering any program in engineering or technology in the state to be affiliated with the university.The university is named after Sir Visvesvaraya from Karnataka, the only engineer to be awarded a Bharat Ratna award, the highest civilian award in India. Jnana Sangama, Belgaum is the headquarters of VTU. Additionally, the university has three regional centers located in Bangalore, Gulbarga and Mysore.VTU is one of the largest universities in India with 208 colleges affiliated to it with an intake capacity of over 67100 undergraduate students and 12666 postgraduate students. The university encompasses various technical & management fields which offers a total of 30 undergraduate and 71 postgraduate courses. The university has around 1800 PhD candidates.Presently, VTU has 13 QIP centers and 17 extension centers in its various affiliated colleges offering post graduate courses. It has around 2305 departments recognized as research centers which are spread across its various affiliated institutions in different cities of Karnataka.It is one of the few universities of India to have 16 of its affiliated colleges recognised by the World Bank for getting assistance in setting up state of art laboratories, campus facilities and research centers under the TEQIP program.The university is administered by its Executive Council and Academic Senate whose members are selected from the academic community and government officials. The present Chancellor of the university is His Excellency, Sri Vajubhai Vala, Governor of Karnataka state and the Vice-Chancellor is Dr. H. Maheshappa.The Jnana Sangama, Belgaum campus and the regional and extension centers of VTU at Bangalore, Davangere, Gulbarga and Mysore offer M.Tech, MBA, MCA and PhD programs.The University has signed MoUs with various Multinational corporation like IBM, Intel Asia Electronics Inc., Ingersoll-Rand Ltd., Bangalore, Nokia, Bosch Rexroth and Microsoft to improve the industry interactions for both students and the teachers.VTU is one of the member universities of the Association of Indian Universities and Association of Commonwealth Universities. Wikipedia.

Elnaggar M.H.A.,Universiti Sains Malaysia | Abdullah M.Z.,Universiti Sains Malaysia | Abdul Mujeebu M.,Visvesvaraya Technological University
Energy Conversion and Management | Year: 2012

As part of the ongoing research on finned U-shape heat pipes for CPU cooling, the present work focuses on the characterization of working fluid in vertically oriented twin U-shape heat pipe, by taking into account the gravity of flow. Two-dimensional FE simulation is performed under natural and forced convection modes, by using ansys-flotran. The best heat input and coolant velocity for the simulations are determined experimentally, corresponding to the least thermal resistance. The wall temperatures at the evaporator, adiabatic and condenser sections, and the velocity and pressure distributions of vapor and liquid, are analyzed. The total heat input for minimum thermal resistance in both natural and forced convection is found to be 50 W, and the coolant velocity is 3 m/s. The predicted and experimental wall temperatures are found in excellent match. It is observed that for the present U-shape heat pipe configuration, the difference in evaporator and condenser temperatures is significantly small, resulting in enhanced heat transfer compared to the conventional heat pipes. The sintered copper wick has a small pore size, resulting in low wick permeability, leading to the generation of high capillary forces for anti-gravity applications. © 2012 Elsevier Ltd. All rights reserved.

Pariyarath P.N.,Visvesvaraya Technological University
International Journal of ChemTech Research | Year: 2014

In this report we look at issues related with existing technologies and techniques which are used to improve the soil stabilization. It is a known fact that all structures, roads deteriorate over time. Deterioration is primarily due to accumulated damage from vehicles or environmental effects such as frost heaves, thermal cracking and oxidation. These deterioration problems can only be overcome by strong stabilization of the soil. In this Report we study about the stabilizing properties of the proteins obtained from the termite saliva. The stabilizing agents are extracted with a series of procedures and are mixed with the soil and studies are done on its soil binding properties. After a series of studies of the soil stabilizing agents on the soil it was found that the soil stabilizing agent itself is a Glycoprotein. The appropriate amount of the saturated stabilizing agent to be mixed with soil is estimated to be 75%. The comparative compression test of the soil mixed with water and soil binding agent was studied and it was found that the diluted sample of our soil binding agent in the ratio 1:4 gave 0.146 N/mm2 suggesting that the sample when mixed with laterite soil and compacted can withstand far more stress when compared to laterite soil mixed with water. © 2014 Sphinx Knowledge House. All rights reserved.

In the present study, the effect of minor additions of copper (Cu) on the elevated temperature wear behaviour of A356 (Al-7Si-0.3Mg) alloy have been investigated using a high temperature pin-on-disc wear testing machine. Effect of alloy composition, normal pressures, sliding speeds and sliding distances on A356 alloy at constant temperature of 300 °C have been studied. The cast alloys and worn surfaces were characterized by SEM/EDX microanalysis. The results suggest that, the wear rate of A356 alloy increases with increase in normal pressures, sliding speeds and sliding distances in all the cases studied and decreases with 0.5%Cu addition level to the A356 alloy at the tested temperature. This is due to the partial refinement of α-Al dendrites and solid solution strengthening and precipitation hardening. The worn surface study indicates that, the formation of Fe-rich oxide layer between the mating surfaces during sliding improves tribological properties. © 2011 Elsevier B.V.

Suresha S.,Indian National Institute of Engineering | Suresha S.,Visvesvaraya Technological University | Sridhara B.K.,Indian National Institute of Engineering
Materials and Design | Year: 2012

Hybrid aluminum metal matrix composites reinforced with silicon carbide (SiC) and graphite (Gr) are extensively used due to high strength and wear resistance. Friction behavior of such hybrid composites is quite vital in deciding the optimal combination of SiC and Gr. The sliding friction response of stir cast hybrid aluminum composites reinforced with equal weight fraction of SiC and Gr particulates of 2.5%, 5%, 7.5% and 10% reinforcement is investigated. The influence of % reinforcement, load, sliding speed and sliding distance on friction coefficient is studied using pin-on-disk equipment with tests based on design of experiments. Hardness of the composites decreases with increase in % reinforcement. Friction coefficient is influenced by sliding speed as well as load and its average value is around 0.269. But, % reinforcement and sliding distance do not affect the friction coefficient. © 2011 Elsevier Ltd.

Kiran T.S.,Kalpataru Institute of Technology | Prasanna Kumar M.,Visvesvaraya Technological University | Basavarajappa S.,Davangere University | Viswanatha B.M.,Kalpataru Institute of Technology
Materials and Design | Year: 2014

Dry sliding wear behavior of zinc based alloy and composite reinforced with SiCp (9. wt%) and Gr (3. wt%) fabricated by stir casting method was investigated. Heat treatment (HT) and aging of the specimen were carried out, followed by water quenching. Wear behavior was evaluated using pin on disc apparatus. Taguchi technique was used to estimate the parameters affecting the wear significantly. The effect of HT was that it reduced the microcracks, residual stresses and improved the distribution of microconstituents. The influence of various parameters like applied load, sliding speed and sliding distance on wear behavior was investigated by means and analysis of variance (ANOVA). Further, correlation between the parameters was determined by multiple linear regression equation for each response. It was observed that the applied load significantly influenced the wear volume loss (WVL), followed by sliding speed implying that increase in either applied load or sliding speed increases the WVL. Whereas for composites, sliding distance showed a negative influence on wear indicating that increase in sliding distance reduces WVL due to the presence of reinforcements. The wear mechanism of the worn out specimen was analyzed using scanning electron microscopy. The analysis shows that the formation and retention of ceramic mixed mechanical layer (CMML) plays a major role in the dry sliding wear resistance. © 2014 Elsevier Ltd.

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