The Experts below are selected from a list of 240 Experts worldwide ranked by ideXlab platform
Dipshikha Chakravortty - One of the best experts on this subject based on the ideXlab platform.
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Development of micro-shock wave assisted dry particle and fluid jet delivery system
Applied Microbiology and Biotechnology, 2012Co-Authors: S. G. Rakesh, Gopalan Jagadeesh, Divya Prakash Gnanadhas, Uday Sankar Allam, Karaba N. Nataraja, P. K. Barhai, Dipshikha ChakravorttyAbstract:Small quantity of energetic material coated on the inner wall of a polymer tube is proposed as a new method to generate micro-shock waves in the laboratory. These micro-shock waves have been harnessed to develop a novel method of delivering dry particle and liquid jet into the target. We have generated micro-shock waves with the help of reactive explosive compound [high melting explosive (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) and traces of aluminium] coated polymer tube, utilising ∼9 J of energy. The detonation process is initiated electrically from one end of the tube, while the micro-shock wave followed by the products of detonation escape from the open end of the polymer tube. The energy available at the open end of the polymer tube is used to accelerate tungsten micro-particles coated on the other side of the Diaphragm or force a liquid jet out of a small cavity filled with the liquid. The micro-particles deposited on a thin Metal Diaphragm (typically 100-μm thick) were accelerated to high velocity using micro-shock waves to penetrate the target. Tungsten particles of 0.7 μm diameter have been successfully delivered into agarose gel targets of various strengths (0.6–1.0 %). The device has been tested by delivering micro-particles into potato tuber and Arachis hypogaea Linnaeus (ground nut) stem tissue. Along similar lines, liquid jets of diameter ∼200–250 μm (methylene blue, water and oils) have been successfully delivered into agarose gel targets of various strengths. Successful vaccination against murine salmonellosis was demonstrated as a biological application of this device. The penetration depths achieved in the experimental targets are very encouraging to develop a future device for biological and biomedical applications.
Gopalan Jagadeesh - One of the best experts on this subject based on the ideXlab platform.
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Development of micro-shock wave assisted dry particle and fluid jet delivery system
Applied Microbiology and Biotechnology, 2012Co-Authors: S. G. Rakesh, Gopalan Jagadeesh, Divya Prakash Gnanadhas, Uday Sankar Allam, Karaba N. Nataraja, P. K. Barhai, Dipshikha ChakravorttyAbstract:Small quantity of energetic material coated on the inner wall of a polymer tube is proposed as a new method to generate micro-shock waves in the laboratory. These micro-shock waves have been harnessed to develop a novel method of delivering dry particle and liquid jet into the target. We have generated micro-shock waves with the help of reactive explosive compound [high melting explosive (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) and traces of aluminium] coated polymer tube, utilising ∼9 J of energy. The detonation process is initiated electrically from one end of the tube, while the micro-shock wave followed by the products of detonation escape from the open end of the polymer tube. The energy available at the open end of the polymer tube is used to accelerate tungsten micro-particles coated on the other side of the Diaphragm or force a liquid jet out of a small cavity filled with the liquid. The micro-particles deposited on a thin Metal Diaphragm (typically 100-μm thick) were accelerated to high velocity using micro-shock waves to penetrate the target. Tungsten particles of 0.7 μm diameter have been successfully delivered into agarose gel targets of various strengths (0.6–1.0 %). The device has been tested by delivering micro-particles into potato tuber and Arachis hypogaea Linnaeus (ground nut) stem tissue. Along similar lines, liquid jets of diameter ∼200–250 μm (methylene blue, water and oils) have been successfully delivered into agarose gel targets of various strengths. Successful vaccination against murine salmonellosis was demonstrated as a biological application of this device. The penetration depths achieved in the experimental targets are very encouraging to develop a future device for biological and biomedical applications.
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Theoretical–experimental study of shock wave-assisted Metal forming process using a Diaphragmless shock tube
Proceedings of the Institution of Mechanical Engineers Part G: Journal of Aerospace Engineering, 2011Co-Authors: S.r.a Nagaraja, J.k.b Prasad, Gopalan JagadeeshAbstract:The use of high-velocity sheet-forming techniques where the strain rates are in excess of 10(2)/s can help us solve many problems that are difficult to overcome with traditional Metal-forming techniques. In this investigation, thin Metallic plates/foils were subjected to shock wave loading in the newly developed Diaphragmless shock tube. The conventional shock tube used in the aerodynamic applications uses a Metal Diaphragm for generating shock waves. This method of operation has its own disadvantages including the problems associated with repeatable and reliable generation of shock waves. Moreover, in industrial scenario, changing Metal Diaphragms after every shot is not desirable. Hence, a Diaphragmless shock tube is calibrated and used in this study. Shock Mach numbers up to 3 can be generated with a high degree of repeatability (+/- 4 per cent) for the pressure jumps across the primary shock wave. The shock Mach number scatter is within +/- 1.5 per cent. Copper, brass, and aluminium plates of diameter 60 mm and thickness varying from 0.1 to 1 mm are used. The plate peak over-pressures ranging from 1 to 10 bar are used. The midpoint deflection, circumferential, radial, and thickness strains are measured and using these, the Von Mises strain is also calculated. The experimental results are compared with the numerical values obtained using finite element analysis. The experimental results match well with the numerical values. The plastic hinge effect was also observed in the finite element simulations. Analysis of the failed specimens shows that aluminium plates had mode I failure, whereas copper plates had mode II failure.
S. G. Rakesh - One of the best experts on this subject based on the ideXlab platform.
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Development of micro-shock wave assisted dry particle and fluid jet delivery system
Applied Microbiology and Biotechnology, 2012Co-Authors: S. G. Rakesh, Gopalan Jagadeesh, Divya Prakash Gnanadhas, Uday Sankar Allam, Karaba N. Nataraja, P. K. Barhai, Dipshikha ChakravorttyAbstract:Small quantity of energetic material coated on the inner wall of a polymer tube is proposed as a new method to generate micro-shock waves in the laboratory. These micro-shock waves have been harnessed to develop a novel method of delivering dry particle and liquid jet into the target. We have generated micro-shock waves with the help of reactive explosive compound [high melting explosive (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) and traces of aluminium] coated polymer tube, utilising ∼9 J of energy. The detonation process is initiated electrically from one end of the tube, while the micro-shock wave followed by the products of detonation escape from the open end of the polymer tube. The energy available at the open end of the polymer tube is used to accelerate tungsten micro-particles coated on the other side of the Diaphragm or force a liquid jet out of a small cavity filled with the liquid. The micro-particles deposited on a thin Metal Diaphragm (typically 100-μm thick) were accelerated to high velocity using micro-shock waves to penetrate the target. Tungsten particles of 0.7 μm diameter have been successfully delivered into agarose gel targets of various strengths (0.6–1.0 %). The device has been tested by delivering micro-particles into potato tuber and Arachis hypogaea Linnaeus (ground nut) stem tissue. Along similar lines, liquid jets of diameter ∼200–250 μm (methylene blue, water and oils) have been successfully delivered into agarose gel targets of various strengths. Successful vaccination against murine salmonellosis was demonstrated as a biological application of this device. The penetration depths achieved in the experimental targets are very encouraging to develop a future device for biological and biomedical applications.
Kishore Putha - One of the best experts on this subject based on the ideXlab platform.
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A high sensitive FBG pressure sensor using thin Metal Diaphragm
Journal of Optics, 2014Co-Authors: Vengal Rao Pachava, Srimannarayana Kamineni, Sai Shankar Madhuvarasu, Kishore PuthaAbstract:A high sensitive pressure sensor using fiber Bragg grating (FBG), integrated with thin Metal Diaphragm is designed and investigated both theoretically and experimentally. Under pressure the Diaphragm deflection causes an axially stretched-strain along the length of the FBG. The pressure sensitivity of the sensor gained from the test results is 2.05 × 10^−2 MPa^−1, approximately four orders of magnitude higher than that can be measured with the bare FBG. Experimental results showed good agreement with the proposed theoretical results.
Divya Prakash Gnanadhas - One of the best experts on this subject based on the ideXlab platform.
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Development of micro-shock wave assisted dry particle and fluid jet delivery system
Applied Microbiology and Biotechnology, 2012Co-Authors: S. G. Rakesh, Gopalan Jagadeesh, Divya Prakash Gnanadhas, Uday Sankar Allam, Karaba N. Nataraja, P. K. Barhai, Dipshikha ChakravorttyAbstract:Small quantity of energetic material coated on the inner wall of a polymer tube is proposed as a new method to generate micro-shock waves in the laboratory. These micro-shock waves have been harnessed to develop a novel method of delivering dry particle and liquid jet into the target. We have generated micro-shock waves with the help of reactive explosive compound [high melting explosive (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) and traces of aluminium] coated polymer tube, utilising ∼9 J of energy. The detonation process is initiated electrically from one end of the tube, while the micro-shock wave followed by the products of detonation escape from the open end of the polymer tube. The energy available at the open end of the polymer tube is used to accelerate tungsten micro-particles coated on the other side of the Diaphragm or force a liquid jet out of a small cavity filled with the liquid. The micro-particles deposited on a thin Metal Diaphragm (typically 100-μm thick) were accelerated to high velocity using micro-shock waves to penetrate the target. Tungsten particles of 0.7 μm diameter have been successfully delivered into agarose gel targets of various strengths (0.6–1.0 %). The device has been tested by delivering micro-particles into potato tuber and Arachis hypogaea Linnaeus (ground nut) stem tissue. Along similar lines, liquid jets of diameter ∼200–250 μm (methylene blue, water and oils) have been successfully delivered into agarose gel targets of various strengths. Successful vaccination against murine salmonellosis was demonstrated as a biological application of this device. The penetration depths achieved in the experimental targets are very encouraging to develop a future device for biological and biomedical applications.