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  1. No Access

    Chapter and Conference Paper

    The Influence of the Reynolds Number on the Auto-Rotation of Samaras

    As samara seeds fall from trees, they enter into auto-rotation. In this way they maximize dispersal distances (Green, Am J Bot 169:1218–1224, 1998, [2]). In this study, we present direct numerical simulations of ...

    G. Arranz, M. Moriche, M. Uhlmann, O. Flores… in Direct and Large-Eddy Simulation XI (2019)

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    Chapter and Conference Paper

    Direct Numerical Simulation of Vertical Particulate Channel Flow in the Turbulent Regime

    We have conducted a DNS study of dilute turbulent particulate flow in a vertical plane channel, considering up to 8192 finite-size rigid particles with numerically resolved phase interfaces. The particle diame...

    M. Uhlmann, A. Pinelli in Proceedings of the 20th International Conf… (2010)

  3. Chapter and Conference Paper

    A computational study of the hydrodynamic forces on a rough wall

    The hydrodynamic interaction of a fluid with a rough wall results in a net force on the roughness elements. This can cause erosion of the roughness elements – an important aspect for sediment transport in rive...

    C. Braun, M. García-Villalba, M. Uhlmann in Advances in Turbulence XII (2009)

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    Chapter and Conference Paper

    The effect of coherent structures on the secondary flow in a square duct

    The appearance of secondary flow of Prandtl’s second kind is a well-known phenomenon in fully developed turbulent rectangular duct flow. The intensity of the secondary flow is two orders of magnitude smaller t...

    A. Sekimoto, A. Pinelli, M. Uhlmann, G. Kawahara in Advances in Turbulence XII (2009)

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    Chapter and Conference Paper

    Travelling waves in a straight square duct

    Isothermal, incompressible flow in a straight duct with square cross-section is known to be linearly stable [1]. Direct numerical simulation, on the other hand, has revealed that turbulence in this geometry is...

    M. Uhlmann, G. Kawahara, A. Pinelli in Advances in Turbulence XII (2009)

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    Chapter and Conference Paper

    Characterisation of Marginally Turbulent Square Duct Flow

    M. Uhlmann, A. Pinelli, A. Sekimoto, G. Kawahara in Advances in Turbulence XI (2007)

  7. No Access

    Chapter and Conference Paper

    Second Order Entropy Consistent Modelling of Turbulent Compressible Flows

    We examine herein the suitability of some second order closures to describe turbulent compressible flows with shocks, applying the standard Favre averaging technique. The basic set of equations reads: ...

    G. Brun, J. M. Hérard, L. Leal De Sousa, M. Uhlmann in Advances in Turbulence VI (1996)