Results 41 to 50 of about 375 (167)

Spectral-element simulations of variable-density turbulent flow in a plane channel

EPJ Web of Conferences, 2017
We perform Large-eddy simulations (LES) of the turbulent flow in a channel with isothermal heated walls with the temperature ratio equal to 2. The variable properties of the fluid are accounted for by using the low Mach number approximation. The Reynolds
Ryzhenkov Vladimir, Ivashchenko Vladislav, Vinuesa Ricardo, Mullyadzhanov Rustam   +3 more
doaj   +1 more source

The Ceiling Height of Wildland Fire Plumes in Quasi‐Steady Stratified and Sheared Boundary Layers

Earth and Space Science, Volume 13, Issue 8, August 2026.
Abstract Radar observations from a prescribed fire experiment reveal a large‐scale, billow‐like vorticity structure associated with the plume head near the onset of plume bending. This bending limits the vertical extent of the plume and defines the characteristic plume ceiling height.
Jie Sun, Kevin Speer, Bryan Quaife, Ming Cai, David Schvartzman   +4 more
wiley   +1 more source

The Role of Time‐ and Spatially Varying Wind in Coastal Circulation Based on High‐Resolution Oceanic and Atmospheric Simulations

Journal of Geophysical Research: Oceans, Volume 131, Issue 8, August 2026.
Abstract Wind forcing plays a central role in oceanic circulation, including circulation in small bays where complex coastal orography modulates local winds both in time and space. However, their role in the circulation of such bays remains unclear because local winds are difficult to observe directly over the sea. Here, we used oceanic and atmospheric
Yoo‐Jun Kim, Kiyoshi Tanaka, Hyodae Seo, Kosei Komatsu, Yoshimasa Matsumura, César Sauvage, Christoph Renkl   +6 more
wiley   +1 more source

Introducing the Coincidence Index: A Novel Diagnostic and Production‐Based Framework for Water Body Interaction Analysis and Its Application to Study the Interaction of River Plumes

Journal of Advances in Modeling Earth Systems, Volume 18, Issue 8, August 2026.
Abstract Quantifying interactions between distinct water bodies is critical yet challenging for understanding ocean and estuarine dynamics. We introduce the coincidence index (CI), defined as the product of two arbitrary tracers (a $a$, b $b$), to diagnose where two water masses coexist and mix.
Xiangyu Li, Knut Klingbeil, Hans Burchard   +2 more
wiley   +1 more source

Large Eddy Simulation of the Flow around a Generic Submarine under Straight-Ahead and 10° Yaw Conditions

Journal of Marine Science and Engineering, 2023
Aiming towards a better understanding of the flow field around a fully appended Joubert BB2 submarine model, and in order to complement the experimental investigations of the wake of the hydroplanes and sail, large eddy simulation (LES) with the dynamic ...
Mo Chen, Nan Zhang, Hailang Sun, Xuan Zhang   +3 more
doaj   +1 more source

Calibration of a Neural Network Ocean Closure for Improved Mean State and Variability

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Global ocean models exhibit biases in the mean state and variability, particularly at coarse resolution, where mesoscale eddies are unresolved. To address these biases, parameterization coefficients are typically tuned ad hoc. Here, we formulate parameter tuning as a calibration problem using Ensemble Kalman Inversion (EKI).
Pavel Perezhogin, Alistair Adcroft, Laure Zanna   +2 more
wiley   +1 more source

Dynamic modeling of the horizontal eddy viscosity coefficient for quasigeostrophic ocean circulation problems

Journal of Ocean Engineering and Science, 2016
This paper puts forth a simplified dynamic modeling strategy for the eddy viscosity coefficient parameterized in space and time. The eddy viscosity coefficient is dynamically adjusted to the local structure of the flow using two different nonlinear eddy ...
Romit Maulik, Omer San
doaj   +1 more source

Landfall Reorganizes Eyewall Boundary Layer Transport and Scale Coupling in Typhoon Hato (2017)

Geophysical Research Letters, Volume 53, Issue 13, 16 July 2026.
Abstract Landfall reorganizes the tropical cyclone eyewall boundary layer (BL) through elevated surface roughness and reduced enthalpy fluxes. Using a 100‐m resolution nested large‐eddy simulation of Typhoon Hato (2017), we compare eyewall BL structures before and during landfall.
Ping Zhou, Zhongming Gao, Yulong Ma, Zikai Lin, Yongwei He, Jiagui Huang, Muxian Chen, Lei Li   +7 more
wiley   +1 more source

Dissipation and Regularity in the Smagorinsky Model with Dynamic Boundaries

This article presents an innovative extension of the Smagorinsky model incorporating dynamic boundary conditions and advanced regularity methods. We formulate the modified Navier-Stokes equations with the Smagorinsky term to model dissipation in turbulence and prove theorems concerning the existence, uniqueness, and asymptotic behavior of solutions ...
Santos, Rômulo Damasclin Chaves dos, Sales, Jorge Henrique de Oliveira   +1 more
openaire   +2 more sources

Scale‐up of Streptomyces species cultivations based on the morphological response to the energy dissipation rate

AIChE Journal, Volume 72, Issue 7, July 2026.
Abstract Filamentous microorganisms exhibit complex morphologies that influence product formation and are affected by various bioprocess parameters. Consistent morphology is therefore essential for comparable results during scale‐up. This study investigates the scale‐up of Streptomyces species (Streptomyces spp.) cultivations from shake flasks to ...
Gesa Brauneck, Anton Brass, Artiom Boreiko, Marvin Ueßeler, Marcel Mann, Johannes Pastoors, Valentin Steier, Philipp Eibl, Christian Witz, Dorothea M. Schütterle, Ivan Schlembach, Miriam A. Rosenbaum, Jorgen Magnus   +12 more
wiley   +1 more source