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Daniel Svensek - One of the best experts on this subject based on the ideXlab platform.

  • Confined chiral polymer nematics : ordering and spontaneous Condensation
    Europhysics letters, 2016
    Co-Authors: Rudolf Podgornik, Daniel Svensek
    Abstract:

    We investigate Condensation of a long confined chiral nematic polymer inside a spherical enclosure, mimicking Condensation of DNA inside a viral capsid. The Landau-de Gennes nematic free-energy Ansatz appropriate for nematic polymers allows us to study the Condensation Process in detail with different boundary conditions at the enclosing wall that simulate repulsive and attractive polymer-surface interactions. By increasing the chirality, we observe a transformation of the toroidal condensate into a closed surface with an increasing genus, in some respects akin to the ordered domain formation observed in cryo-microscopy of bacteriophages.

  • confined chiral polymer nematics ordering and spontaneous Condensation
    arXiv: Soft Condensed Matter, 2012
    Co-Authors: Daniel Svensek, Rudolf Podgornik
    Abstract:

    We investigate Condensation of a long confined chiral nematic polymer inside a spherical enclosure, mimicking Condensation of DNA inside a viral capsid. The Landau-de Gennes nematic free energy {\sl Ansatz} appropriate for nematic polymers allows us to study the Condensation Process in detail with different boundary conditions at the enclosing wall that simulate repulsive and attractive polymer-surface interactions. Increasing the chirality, we observe a transformation of the toroidal condensate into a closed surface with an increasing genus, akin to the ordered domain formation observed in cryo-microscopy of bacteriophages.

Rudolf Podgornik - One of the best experts on this subject based on the ideXlab platform.

  • Confined chiral polymer nematics : ordering and spontaneous Condensation
    Europhysics letters, 2016
    Co-Authors: Rudolf Podgornik, Daniel Svensek
    Abstract:

    We investigate Condensation of a long confined chiral nematic polymer inside a spherical enclosure, mimicking Condensation of DNA inside a viral capsid. The Landau-de Gennes nematic free-energy Ansatz appropriate for nematic polymers allows us to study the Condensation Process in detail with different boundary conditions at the enclosing wall that simulate repulsive and attractive polymer-surface interactions. By increasing the chirality, we observe a transformation of the toroidal condensate into a closed surface with an increasing genus, in some respects akin to the ordered domain formation observed in cryo-microscopy of bacteriophages.

  • confined chiral polymer nematics ordering and spontaneous Condensation
    arXiv: Soft Condensed Matter, 2012
    Co-Authors: Daniel Svensek, Rudolf Podgornik
    Abstract:

    We investigate Condensation of a long confined chiral nematic polymer inside a spherical enclosure, mimicking Condensation of DNA inside a viral capsid. The Landau-de Gennes nematic free energy {\sl Ansatz} appropriate for nematic polymers allows us to study the Condensation Process in detail with different boundary conditions at the enclosing wall that simulate repulsive and attractive polymer-surface interactions. Increasing the chirality, we observe a transformation of the toroidal condensate into a closed surface with an increasing genus, akin to the ordered domain formation observed in cryo-microscopy of bacteriophages.

Hongbao Zhang - One of the best experts on this subject based on the ideXlab platform.

  • nonequilibrium Condensation Process of a holographic p wave superconductor
    Physical Review D, 2018
    Co-Authors: Xingliang Chen, Hongbao Zhang
    Abstract:

    We study the nonequilibrium Condensation Process of a holographic $p$-wave superconductor model, which is described by Einstein-Maxwell theory coupled with the charged complex vector field in asymptotic anti-de Sitter (AdS) spacetime. By solving the gravitational dynamics in the asymptotic AdS spacetime numerically, we obtain the full time dependent solution of the system, and observe a dynamical Process from the perturbed Reissner-Nordstr\"om-AdS black hole to the anisotropic black hole with vector hair when the initial black hole temperature is smaller than the critical temperature ${T}_{c}$. By holography, this nonlinear dynamical Process is then dual to the phase transition Process from a normal state to a $p$-wave superconducting state on the boundary theory. We also investigate the time evolution of the superconducting condensate operator and horizon area.

G G Yankov - One of the best experts on this subject based on the ideXlab platform.

  • modeling steam Condensation from steam air mixture in the inclined tubes of an air cooled condenser
    Thermal Engineering, 2014
    Co-Authors: V I Artemov, K B Minko, G G Yankov
    Abstract:

    Specific features pertinent to the flow of steam-gas mixture are discussed as applied to the inclined tubes of air-cooled condensers used in steam turbine units, and the condensate film annular flow and “streamlet” models are analyzed. The calculated results are compared with the data obtained by other researchers. It is shown that with relatively small flow rates of steam-gas mixture typical for air-cooled condensers, the restoration of pressure along the channel may exceed the losses connected with hydraulic resistance. Data on the influence of cooling air temperature on the Condensation Process are also presented.

Ulrich Gross - One of the best experts on this subject based on the ideXlab platform.

  • modeling of heat and mass transfer for dropwise Condensation of moist air and the experimental validation
    International Journal of Heat and Mass Transfer, 2018
    Co-Authors: Shaofei Zheng, Ferdinand Eimann, Christian Philipp, Tobias Fieback, Ulrich Gross
    Abstract:

    Abstract A single droplet model is developed to describe the droplet growth during dropwise Condensation of moist air on a cold substrate. The Condensation Process is divided by the droplet surface into two parts. The first step, i.e. the Processes of mass transfer from the surroundings to the droplet surface, is modeled by the Kinetic theory and the laws of continuum fluid dynamics formulated using the two-region concept (Knudsen layer and continuum region) at any droplet size and at any concentration of non-condensable gas (NCG). The second step, i.e. the heat transfer across the droplet, is governed by Fourier’s law of heat conduction. These three regions (the continuum region, the Knudsen layer and the region inside the droplet) are incorporated by the matching both the mass flow rates and the energy flow rates. From these, the droplet growth rate, the nucleation size of droplet, the temperature at the droplet surface and Knudsen layer interface can be evaluated depending on different conditions. For this, a numerical algorithm is developed to reflect the droplet dynamics sufficiently detailed, including nucleation, growth/coalescence, slide-off/fall-off, re-nucleation. This is applied to the simulation of the entire Condensation Process by putting the growth rate and minimum radius from single droplet model into the growth algorithm. Additionally, dropwise Condensation experiments of moist air in different relative humidity (RH) are carried out for validation of the simulation results. Good agreement is obtained which demonstrates that the present droplet growth model for dropwise Condensation of moist air is credible. The current model and experiments also indicate that the diffusion resistance of water vapor in air from the free stream toward the droplet surface has a significant influence for the heat transfer performance of dropwise Condensation of moist air.