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Ramakrishna Rao B.,Naval Materials Research Laboratory | Ramakrishna Rao B.,Indian Institute of Technology Madras | Srinivas M.,Naval Science and Technological Laboratory | Shah A.K.,Panipat Institute of Engineering and Technology | And 2 more authors.
Intermetallics | Year: 2013

A new thermodynamic parameter PHSS (PHSS = ΔHC(ΔSσ/kB)(ΔS C/R)) is proposed, to describe and predict the glass forming ability (GFA) of Fe based alloys. Here ΔHC is the chemical enthalpy of mixing, ΔSσ is the mismatch entropy and ΔS C is the configurational entropy. The PHSS parameter incorporates enthalpy of mixing, size mismatch and the number of elements in the systems which influence GFA significantly. It was observed from rapid solidification processing (RSP) and mechanical alloying (MA) studies that, all alloys with PHSS in between -0.55 kJ/mol to -6.00 kJ/mol would form glass in the Fe-Zr-B system. MA and RSP experiments on multi-component Fe-Cr-Ni-Zr-B alloys indicated that PHSS is a better parameter to predict GFA of the system than PHS, a parameter used in earlier studies. It was also observed that bulk metallic glass (BMG) forming alloys can be observed in between a PHSS range of -3.00 kJ/mol to -6.00 kJ/mol, with the maximum thickness of the BMG increasing with decreasing PHSS within the above range. © 2012 Elsevier Ltd. All rights reserved.

Katyal A.,Panipat Institute of Engineering and Technology
Man-Made Textiles in India | Year: 2011

Today water conservation is one of the major global issues especially in developing countries like India. India has 4% of the world's water, studies show average availability is shrinking steadily. It is estimated that by 2020, India will become a water-stressed nation. An innovative fibrous structure, 'Agro-Mat' has been developed to reduce the consumption of water during irrigation of plants. Initial trials have established that the newly developed Agro-Mat can save water by 72% in comparison with traditional watering techniques, such as, Overhead Watering/Sprinkling etc. Additionally, these structures can also be used for the storage and transportation industry where uniform supply of moisture is required to reduce spoilage of raw or finished products.

Kumar P.,Panipat Institute of Engineering and Technology
Rasayan Journal of Chemistry | Year: 2012

Density, speed of sound and viscosity measurements have been made for L-alanine and other amino acids in ethanol-water and isopropyl alcohol-water co-solvents at the temperatures 303.15K, 308.15K and 313.15K having the Concentration of amino acids in the range of 0.01 to 0.10 mol litre. These measurements have been used to evaluate some important parameters Such as isentropic Compressibility, Specific acoustic impedance, intermolecular free-length, molar Sound velocity, Apparent molal compressibility (φk), Specific viscosity, reduced and relative viscosity and Some other parameters for the Same Concentrations and temperature range. These parameters have been discussed in the terms of Solute-Solvent interactions.The ultrasound velocity increases on increasing Concentration of electrolyte. © 2012 RASÄYAN. All rights reserved.

Kumar H.,Panipat Institute of Engineering and Technology | Kumar H.,Kurukshetra University | Chand F.,Kurukshetra University
AIP Advances | Year: 2013

The (21)-dimensional Maccari and nonlinear Schrödinger equations are reduced to a nonlinear ordinary differential equation (ODE) by using a simple transformation, various solutions of the nonlinear ODE are obtained by using extended F-expansion and projective Ricatti equation methods. With the aid of solutions of the nonlinear ODE more explicit traveling wave solutions expressed by the hyperbolic functions, trigonometric functions and rational functions are found out. It is shown that these methods provides a powerful mathematical tool for solving nonlinear evolution equations in mathematical physics. © 2013 Copyright 2013 Author(s). This article is distributed under a Creative Commons Attribution 3.0 Unported License.

Kumar H.,Panipat Institute of Engineering and Technology | Kumar H.,Kurukshetra University | Chand F.,Kurukshetra University
Indian Journal of Physics | Year: 2013

In this paper, we have obtained exact 1-soliton solutions of complex modified KdV equation with variable - coefficients using solitary wave ansatz. Restrictions on parameters of the soliton have been observed in course of the derivation of soliton solutions. Finally, a few numerical simulations of dark and bright solitons have been given. © 2013 Indian Association for the Cultivation of Science.

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