The Experts below are selected from a list of 89397 Experts worldwide ranked by ideXlab platform

Andreas Carlson - One of the best experts on this subject based on the ideXlab platform.

  • effect of wing fold angles on the terminal descent velocity of double winged autorotating seeds fruits and other diaspores
    Physical Review E, 2019
    Co-Authors: Richard A Fauli, Jean Rabault, Andreas Carlson
    Abstract:

    Wind dispersal of seeds is one essential mechanisms for plants to proliferate and to invade new territories. In this paper we present a methodology that combines 3D-printing, a minimal theoretical model and experiments to determine the shape of multi-winged autorotating seeds, fruits and other diaspores that provide them with the optimal wind Dispersion Potential i.e. minimal terminal descent velocity. Experiments are performed on 3D-printed synthetic fruits for a wide range of wing fold angles, base wing angles and wing loadings to determine how these affect the flight. Our experimental and theoretical model find an optimal wing fold angle that minimizes the descent velocity, which may be an important parameter that improves the fitness of these plants in an ecological strategy.

  • effect of wing fold angles on the terminal descent velocity of double winged autorotating seeds fruits and other diaspores
    Physical Review E, 2019
    Co-Authors: Richard A Fauli, Jean Rabault, Andreas Carlson
    Abstract:

    Wind dispersal of seeds is an essential mechanism for plants to proliferate and to invade new territories. In this paper we present a methodology used in our recent work [Rabault, Fauli, and Carlson, Phys. Rev. Lett. 122, 024501 (2019PRLTAO0031-900710.1103/PhysRevLett.122.024501)] that combines 3D printing, a minimal theoretical model, and experiments to determine how the curvature along the length of the wings of autorotating seeds, fruits, and other diaspores provides them with an optimal wind Dispersion Potential, i.e., minimal terminal descent velocity. Experiments are performed on 3D-printed double-winged synthetic fruits for a wide range of wing fold angles (obtained from normalized curvature along the wing length), base wing angles, and wing loadings to determine how these affect the flight. Our experimental and theoretical models find an optimal wing fold angle that minimizes the descent velocity, where the curved wings must be sufficiently long to have horizontal segments, but also sufficiently short to ensure that their tip segments are primarily aligned along the horizontal direction. The curved shape of the wings of double winged autorotating diaspores may be an important parameter that improves the fitness of these plants in an ecological strategy.

Richard A Fauli - One of the best experts on this subject based on the ideXlab platform.

  • effect of wing fold angles on the terminal descent velocity of double winged autorotating seeds fruits and other diaspores
    Physical Review E, 2019
    Co-Authors: Richard A Fauli, Jean Rabault, Andreas Carlson
    Abstract:

    Wind dispersal of seeds is one essential mechanisms for plants to proliferate and to invade new territories. In this paper we present a methodology that combines 3D-printing, a minimal theoretical model and experiments to determine the shape of multi-winged autorotating seeds, fruits and other diaspores that provide them with the optimal wind Dispersion Potential i.e. minimal terminal descent velocity. Experiments are performed on 3D-printed synthetic fruits for a wide range of wing fold angles, base wing angles and wing loadings to determine how these affect the flight. Our experimental and theoretical model find an optimal wing fold angle that minimizes the descent velocity, which may be an important parameter that improves the fitness of these plants in an ecological strategy.

  • effect of wing fold angles on the terminal descent velocity of double winged autorotating seeds fruits and other diaspores
    Physical Review E, 2019
    Co-Authors: Richard A Fauli, Jean Rabault, Andreas Carlson
    Abstract:

    Wind dispersal of seeds is an essential mechanism for plants to proliferate and to invade new territories. In this paper we present a methodology used in our recent work [Rabault, Fauli, and Carlson, Phys. Rev. Lett. 122, 024501 (2019PRLTAO0031-900710.1103/PhysRevLett.122.024501)] that combines 3D printing, a minimal theoretical model, and experiments to determine how the curvature along the length of the wings of autorotating seeds, fruits, and other diaspores provides them with an optimal wind Dispersion Potential, i.e., minimal terminal descent velocity. Experiments are performed on 3D-printed double-winged synthetic fruits for a wide range of wing fold angles (obtained from normalized curvature along the wing length), base wing angles, and wing loadings to determine how these affect the flight. Our experimental and theoretical models find an optimal wing fold angle that minimizes the descent velocity, where the curved wings must be sufficiently long to have horizontal segments, but also sufficiently short to ensure that their tip segments are primarily aligned along the horizontal direction. The curved shape of the wings of double winged autorotating diaspores may be an important parameter that improves the fitness of these plants in an ecological strategy.

Jean Rabault - One of the best experts on this subject based on the ideXlab platform.

  • effect of wing fold angles on the terminal descent velocity of double winged autorotating seeds fruits and other diaspores
    Physical Review E, 2019
    Co-Authors: Richard A Fauli, Jean Rabault, Andreas Carlson
    Abstract:

    Wind dispersal of seeds is one essential mechanisms for plants to proliferate and to invade new territories. In this paper we present a methodology that combines 3D-printing, a minimal theoretical model and experiments to determine the shape of multi-winged autorotating seeds, fruits and other diaspores that provide them with the optimal wind Dispersion Potential i.e. minimal terminal descent velocity. Experiments are performed on 3D-printed synthetic fruits for a wide range of wing fold angles, base wing angles and wing loadings to determine how these affect the flight. Our experimental and theoretical model find an optimal wing fold angle that minimizes the descent velocity, which may be an important parameter that improves the fitness of these plants in an ecological strategy.

  • effect of wing fold angles on the terminal descent velocity of double winged autorotating seeds fruits and other diaspores
    Physical Review E, 2019
    Co-Authors: Richard A Fauli, Jean Rabault, Andreas Carlson
    Abstract:

    Wind dispersal of seeds is an essential mechanism for plants to proliferate and to invade new territories. In this paper we present a methodology used in our recent work [Rabault, Fauli, and Carlson, Phys. Rev. Lett. 122, 024501 (2019PRLTAO0031-900710.1103/PhysRevLett.122.024501)] that combines 3D printing, a minimal theoretical model, and experiments to determine how the curvature along the length of the wings of autorotating seeds, fruits, and other diaspores provides them with an optimal wind Dispersion Potential, i.e., minimal terminal descent velocity. Experiments are performed on 3D-printed double-winged synthetic fruits for a wide range of wing fold angles (obtained from normalized curvature along the wing length), base wing angles, and wing loadings to determine how these affect the flight. Our experimental and theoretical models find an optimal wing fold angle that minimizes the descent velocity, where the curved wings must be sufficiently long to have horizontal segments, but also sufficiently short to ensure that their tip segments are primarily aligned along the horizontal direction. The curved shape of the wings of double winged autorotating diaspores may be an important parameter that improves the fitness of these plants in an ecological strategy.

Daisuke Yokogawa - One of the best experts on this subject based on the ideXlab platform.

Stephen P Beaudoin - One of the best experts on this subject based on the ideXlab platform.

  • london van der waals force field of a chemically patterned surface to enable selective adhesion
    Langmuir, 2019
    Co-Authors: Ravi P Jaiswal, Stephen P Beaudoin
    Abstract:

    The London-van der Waals (L-vdW) force between a particle and a surface strongly depends on the topography and the chemical properties of the interacting surfaces. Although a great deal of work has been done to understand the effect of topographical heterogeneity on the L-vdW adhesion, the role of chemical heterogeneity has been discussed only rarely. This study makes an attempt to quantify the magnitude and range of the L-vdW force acting on a spherical particle in the vicinity of a chemically patterned surface. Specifically, an ideal system of a smooth spherical particle approaching a surface composed of parallel stripes of chemically distinct materials with different Hamaker constants is considered. The L-vdW forces for such systems are determined by solving the London Dispersion Potential for the entire volumes of the adhering bodies from first principles, using Hamaker’s microscopic approach. The computational results elucidate that a chemical interface can apply a tangential L-vdW force, in addition...

  • London-van der Waals Force Field of a Chemically Patterned Surface To Enable Selective Adhesion
    2018
    Co-Authors: Ravi P Jaiswal, Stephen P Beaudoin
    Abstract:

    The London-van der Waals (L-vdW) force between a particle and a surface strongly depends on the topography and the chemical properties of the interacting surfaces. Although a great deal of work has been done to understand the effect of topographical heterogeneity on the L-vdW adhesion, the role of chemical heterogeneity has been discussed only rarely. This study makes an attempt to quantify the magnitude and range of the L-vdW force acting on a spherical particle in the vicinity of a chemically patterned surface. Specifically, an ideal system of a smooth spherical particle approaching a surface composed of parallel stripes of chemically distinct materials with different Hamaker constants is considered. The L-vdW forces for such systems are determined by solving the London Dispersion Potential for the entire volumes of the adhering bodies from first principles, using Hamaker’s microscopic approach. The computational results elucidate that a chemical interface can apply a tangential L-vdW force, in addition to the normal L-vdW force, on nearby particles. This can cause lateral motion of particles neighboring a chemically inhomogeneous surface. The magnitude of the tangential L-vdW force is found to be maximum when the particle is centered at the interface and shows a gradual drop as it moves away from this location. The magnitude and range of the tangential L-vdW force can be large for large colloidal particles in close contact with a chemically patterned surface whose materials have distinct Hamaker constants. This study suggests that the tangential L-vdW force field generated by a chemical interface can be utilized as a tool to manipulate the path of an approaching particle to facilitate selective adhesion