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Your search keyword '"Schmidt, Heiko"' showing total 4 results
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4 results on '"Schmidt, Heiko"'

1. Stochastic Modeling and Large-Eddy Simulation of Heated Concentric Coaxial Pipes

Author

Klein, Marten, Tsai, Pei-Yun, Schmidt, Heiko, Hirschel, Ernst Heinrich, Founding Editor, Schröder, Wolfgang, Series Editor, Boersma, Bendiks Jan, Editorial Board Member, Fujii, Kozo, Editorial Board Member, Haase, Werner, Editorial Board Member, Leschziner, Michael A., Editorial Board Member, Periaux, Jacques, Editorial Board Member, Pirozzoli, Sergio, Editorial Board Member, Rizzi, Arthur, Editorial Board Member, Roux, Bernard, Editorial Board Member, Shokin, Yurii I., Editorial Board Member, Lagemann, Esther, Managing Editor, Dillmann, Andreas, editor, Heller, Gerd, editor, Krämer, Ewald, editor, Wagner, Claus, editor, and Weiss, Julien, editor

Published
2024
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3. Towards stochastic subgrid‐scale modeling of turbulent thermal convection in an under‐resolved off‐lattice Boltzmann method.

Author

Polasanapalli, Sai Ravi Gupta, Klein, Marten, and Schmidt, Heiko

Subjects
STOCHASTIC models, REDUCED-order models, CAPABILITIES approach (Social sciences), COMPUTER simulation, LARGE eddy simulation models, TURBULENCE, EDDY viscosity
Abstract

A characteristic‐based Off‐Lattice Boltzmann Method (OLBM) and a stochastic One‐Dimensional Turbulence (ODT) model is utilized for numerical simulation of turbulent thermal convection. Standalone ODT results for low‐order statistics are compared with those from various eddy‐viscosity‐based subgrid‐scale models utilized in Large‐Eddy Simulations (LES) with OLBM. The predictive capabilities of both approaches are discussed by comparison with available reference Direct Numerical Simulation (DNS) results. All turbulence models are able to predicted the mean temperature, but fail to fully capture fluctuations. While the OLBM aims to represent large‐scale structures, it misses some constitutional small‐scale fluctuations. By contrast, the reduced‐order ODT model captures small‐scale fluctuations in the vicinity of the wall, but cannot resolve the organized bulk flow. Here, the modeling capabilities of both OLBM and ODT as standalone tools are discussed. On this basis, a strategy for the incorporation of ODT as wall model in OLBM is suggested. [ABSTRACT FROM AUTHOR]

Published
2024
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4. The Dynamics of Strategy-Making in New Ventures: Beyond Dualist Accounts.

Author

Schmidt, Heiko Marc and Santamaria-Alvarez, Sandra Milena

Abstract

Entrepreneurial strategy-making has often been described in terms of different reified modes, such as effectuation or causation. Despite widespread agreement that these modes are not exclusively used and change over time, limited research considers them in conjunction and focuses on their interrelation over time. In this article, we employ a constructivist grounded theory approach based on three years of observations, diaries, interviews, and documents to study how causal and effectual strategy-making practices unfold in a new venture. We found strategy-making to be composed of two complementary nexuses of practices that iteratively shape each other over time, one more causal and teleological, the second more effectual. This contributes to theory by recasting the hitherto mostly dualistic accounts of entrepreneurial strategy-making as iterative dualities, complementary and sequenced nexuses of practices that feed into each other. [ABSTRACT FROM AUTHOR]

Published
2024
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