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A. Sarkar & D . Lukáš. Disintegration of Liquid on Capillary Tip –J. Zeleny †. Geometrical Analysis; Balance Between Capillary and Electrostatic Pressures; Critical Angle Evaluated using Fractional Order Legendre Polynomial --Lukas et. al . ‡. - PowerPoint PPT Presentation

Text of A. Sarkar & D . Lukáš

  • *Technical University of Liberec A. Sarkar & D. Luk

    Technical University of Liberec

  • Disintegration of Liquid on Capillary Tip J. Zeleny

    Geometrical Analysis;Balance Between Capillary and Electrostatic Pressures;Critical Angle Evaluated using Fractional Order Legendre Polynomial --Lukas et. al.

    Technical University of Liberec

  • Dependence of P1/2cos() on Field varies by 1/ r (Taylors approach)Analysis near a Wedge Shaped Body The Field varies by 1/r ( Landaus approx. ) Contemporaneous Theories Taylor & Landau Landau, L.D., Lifshitz, E.M.:Electrodynamics of Continuous Media, 2nd Edition (Butterworth-Heinemann, Oxford, 1984) p. 14-15

    Technical University of Liberec

  • Self-organization of Jets in Electrospinning from Free Liquid Surface: A Generalized Approach (Based on Patent: WO2005024101)Hypothesis: Field strength increment can lead to unlimited growth of a wave amplitude. Lukas D., Sarkar A., Pokorny P.:Self organization of jets in electrospinning from free liquid surface - a generalized approach , Journal of Applied Physics, pp. 084309 1-7, 103, (2008)Growing amplitude

    Technical University of Liberec

  • Euler equation Landau equationGravitationDispersion lawSurface TensionElectrostatic forcesContd.

    Technical University of Liberec

  • Capillary forceCritical ValuesElectrostatic forceHidden length scaleCritical field strengthCritical wavelengthElectrospinning numberContd.

    Technical University of Liberec

  • Zelenys datal2rContd.

    Technical University of Liberec

  • Universal curve showing dependency of dimensionless relaxation time, T, on the Electrospinning number, G.Universal Dimensionless ParametersUniversal curve showing dependency of the dimensionless wavelength, L, on the Electrospinning number, G Contd.

    Technical University of Liberec

  • When an electric field interacts with a medium of inhomogeneous dielectric constant, there is a flow of matter in the direction of increasing dielectric constant

    Electrospinning as an Application of the Physical Law of Dielectric Diffusion Minimization of energy in a capacitor

    Competition between dielectrics Lukas D., Sarkar A., Weng M., Electrospinning as an application of the Physical Law of Dielectric Diffusion(poster), Poly-2008 (Advances in Polymer Science and Technology), New Delhi, India, 29 January, 2008

    Technical University of Liberec

  • Force acting on Dielectric in an Electric FieldContd.The law unifies all the Electrohydrodynamic processes of Electrocapillarity, Electrophoresis, Electrospraying, and Electrospinning

    Technical University of Liberec

  • Our Joint Contributions through Publications and Presentations Till July 2008Lukas D. Kostakova E. and Sarkar A.: Computer simulation of moisture transport in fibrous materials, Thermal and moisture transport in fibrous materials, edited by N. Pan and P. Gibson, Woodhead Publishing Limited, Cambridge (2006), pp. 469-541. ISBN-13: 978-1-84569-057-1;Lukas D and Sarkar A.:Disintegration of liquid droplets in electrostatic fields-Bilateral electrospinner, 45th Dornbirn man-made fibers congress, Austria, 20-22 September 2006;Lukas D and Sarkar A.: Physical principles of electrospinning, 32th Simposio de la AEQCT, Barcelona 22-23 March 2006;Lukas D., Sarkar A., Chaloupek J, Principles of Electrospinning (Chapter submitted), Nonwoven Fabrics, Edited by V. K. Kothari, IAFL Publications, New Delhi, India (Due: November 2008);Goyal A., Sarkar A., Plva Z., Kokov E., and Luk D.: Designed electric circuits used as collector for electrospinning, 13th STRUTEX, Liberec, November 2006;

    Technical University of Liberec

  • Chugh V., Sarkar A., Pokorn P., and Luk D. :Disintegration of Liquid Drops and Bilateral Electrospinner, 13th STRUTEX, Liberec, November 2006;Lukas D., Sarkar A., Physical principles of Nedleless Electrospinning and Elactrospraying, 6th International conference TEXSCI07, 5th June, 2008, Technical University of Liberec, Czech Republic;Lukas D., Sarkar A., Pokorny P Sanetrnik F: Physical principles of needleless Electrospinning, Nano for the 3rd millennium, Prague, October 2007, 47-52, ISBN 978-80-254-0476-8;Lukas D., Sarkar A: Physical principles of needleless Electrospinning - Cleft Electrospinners, The Fiber Society 2007 Fall Annual Technical Conference, David/California, October 2007;Lukas D., Sarkar A., Pokorn P.:Fyzikln principy hladinovho elektrostatickho zvlkovn ( Physical principles of Electrospinning from free liquid surfaces) , Letn kola tkovho inenrstv, (Summer-school Tissue Engineering), Liberec 2007;Lukas D., Sarkar A., Pokorn P.: Physical principles of needleless electrospinning, Advanced materials and technologies, Palanga/Lithuania, 27-27, 2007, ISSN 1822-7759;Lukas D., Sarkar A., Pokorn P.: Electrospinning from free liquid surface, International Conference: Poly-2008 (Advances in Polymer Science and Technology), New Delhi, India, 29 January, 2008;

    Technical University of Liberec

  • Lukas D., Sarkar A., Weng M., Electrospinning as an application of the Physical Law of Dielectric Diffusion(poster), Poly-2008 (Advances in Polymer Science and Technology), New Delhi, India, 29 January, 2008;Lukas D., Vodsedalkova K., Chaloupek J., Mikes P., Komarek M., Kostakova E., Raab M., Sarkar A: Fyzika polymer (Polymer Physics), Nakladatelstv Technick univerzita v Liberci, Liberec ( Technical University of Liberec Press), 2008, ISBN 978-80-7372-312-5;Lukas D., Sarkar A., Pokorny P.:Self organization of jets in electrospinning from free liquid surface - a generalized approach , Journal of Applied Physics, pp. 084309 1-7, 103, (2008);Lukas D., Sarkar A., Pokorny P.:Self organization of jets in electrospinning from free liquid surface - a generalized approach , Journal of Applied Physics, pp. 084309 1-7, 103, (2008) published in May 5, 2008 issue of Virtual Journal of Nanoscale Science & Technology, American Institute of Physics;Lectures: Lukas D., Sarkar A., Pokorn P:Fyzikln principy hladinovho elektrostatickho zvlkovn, Nanotechnologie, kurz podan Technologickm centrem AV R (Principles of Needleless Electrospinning, Nanotechnology - a series of lectures organized by Technological Centre of Czech Academy of Sciences and delivered at three Czech universities): January: Brno VUT,February: Kladno VUT, June: Liberec TUL, 2008;Lukas, D., Pan, N. Sarkar, A. , Weng M., Chaloupek, J., Kostakova, E., Ocheretna, L., Mikes, P. and Pociute, M.: Auto-model based computer simulation of Rayleigh Instability, Journal of Statistical Physics (submitted);

    Technical University of Liberec