Results 61 to 70 of about 245,469 (326)

Highly optimized transitions to turbulence [PDF]

Proceedings of the 41st IEEE Conference on Decision and Control, 2002., 2004
We study the Navier-Stokes equations in three dimensional plane Couette flow geometry subject to stream-wise constant initial conditions and perturbations. The resulting two dimensional/three component (2D/3C) model has no bifurcations and is globally (non-linearly) stable for all Reynolds numbers R, yet has a total transient energy amplification that ...
Bobba, K. M., Bamieh, B., Doyle, J. C.
openaire   +2 more sources

Computational Modeling Meets 3D Bioprinting: Emerging Synergies in Cardiovascular Disease Modeling

Advanced Healthcare Materials, EarlyView.
Emerging advances in three‐dimensional bioprinting and computational modeling are reshaping cardiovascular (CV) research by enabling more realistic, patient‐specific tissue platforms. This review surveys cutting‐edge approaches that merge biomimetic CV constructs with computational simulations to overcome the limitations of traditional models, improve ...
Tanmay Mukherjee, Mehdi Salar Amoli, Sarah Rezapourdamanab, Lama Rita El Shammas, Martin L. Tomov, Emilio A. Mendiola, Vahid Serpooshan, Reza Avazmohammadi   +7 more
wiley   +1 more source

Effects of the Uncertainty of Wall Distance on the Simulation of Turbulence/Transition Phenomena

Aerospace
The uncertainty of the turbulence/transition model is a problem with relatively high attention in the CFD area. Wall distance is an important physical parameter in turbulence/transition modeling, and its accuracy has a large effect on numerical ...
Weiwei Tan, Heran Zhang, Lan Wang, Shengyang Nie, Jin Jiao, Yingtao Zuo   +5 more
doaj   +1 more source

Rotating disks and cones a centennial of von Kármán’s 1921 paper

Journal of Fluid Science and Technology, 2023
It is now more than 100 years since the work of von Kármán (1921) on the boundary-layer flow over a rotating disk was published in the first volume of Zeitschrift für Angewandte Mathematik und Mechanik (ZAMM, Vol. 1(4), pp 233-252).
Kentaro KATO, Rebecca J. LINGWOOD, P. Henrik ALFREDSSON   +2 more
doaj   +1 more source

Simvastatin Restores Uteroplacental Hemodynamics and Trophoblast Function in Obstetric Antiphospholipid Syndrome in a Placenta‐on‐a‐Chip Model

Advanced Healthcare Materials, EarlyView.
Simvastatin mitigates placental hypoperfusion in OAPS by ameliorating abnormal uteromaternal hemodynamics and enhancing trophoblast invasion via optimized endothelial cell interactions under pathological shear stress, as evidenced by results from a placenta‐on‐a‐chip platform.
Hongli Liu, Yuan Wang, Yanjun Cai, Ruixin Guo, Shunhua Liu, Tingting Chen, Tingting Sun, Ruiheng Huo, Tengwei Liu, Qingfeng Lv, Xietong Wang   +10 more
wiley   +1 more source

Enhanced Endoscopic Internal Drainage of Gastric Abscess Through Additively Manufactured Stents

Advanced Healthcare Materials, EarlyView.
Postoperative gastric leaks are often treated with off‐label biliary double‐pigtail stents, yet conventional extruded designs are not optimized for leak anatomy, can migrate, and may limit abscess evacuation. PETALS is introduced to optimize transmural drainage geometry and enable patient‐specific 3D‐printable stents.
Parima Phowarasoontorn, Yongbin Ko, Juan S. Barajas‐Gamboa, Juan P. Pantoja, Oraib Al‐Ketan, Mohamed Ali, Sungyun Sohn, Heba Tageldeen Naser, Abdel‐Hameed Dabbour, Batoul Khlaifat, Ahmed AlZubaidi, Carlos Abril Vega, John Rodriguez, Matthew Kroh, Khalil B. Ramadi   +14 more
wiley   +1 more source

Transition to turbulence in slowly divergent pipe flow

, 2013
The results of a combined experimental and numerical study of the flow in slowly diverging pipes are presented. Interestingly, an axisymmetric conical recirculation cell has been observed.
Bird R. B., Craya A., Hugues Besnard, Jorge Peixinho   +3 more
core   +2 more sources

Oxygen Supply of Islets of Langerhans by Photosynthetically Active Microalgae in Bioprinted Co‐Cultures Maintains Their Function in a Hypoxic Environment

Advanced Healthcare Materials, EarlyView.
This study developed a bioprinted co‐culture system embedding rat pancreatic islets and Scenedesmus sp. microalgae spatially defined in close vicinity. Red light was found optimal to ensure microalgal photosynthesis while maintaining islet viability and functionality. A tailored co‐culture medium supported both cell types.
Finn Dani, Sarah Duin, Ashwini Rahul Akkineni, Susann Lehmann, Barbara Ludwig, Michael Kühl, Michael Gelinsky, Anja Lode   +7 more
wiley   +1 more source

Transition from the chaotic turbulence to the turbulent structures

Discrete Dynamics in Nature and Society, 1999
Weak turbulence, similar to incoherent light, may be represented as an ensemble of quasi-free quanta or Fourier harmonics. Unlike it, strongly turbulent state should be based on nonlinear structures.
A. Kingsep
doaj   +1 more source

A Superhydrophobic 3D Cell Culture System Reveals the Mechanobiological Role of Cancer‐Associated Fibroblasts in Prostate Cancer Metastasis

Advanced Healthcare Materials, EarlyView.
A superhydrophobic 3D cell culture platform enables rapid and consistent formation of heterotypic tumor–stroma clusters, and reveals how physiological shear conditions influence metastatic signaling. Mechanical stimulation of cancer‐associated fibroblasts promotes sustained cytokine secretion and survival‐promoting pathways, showing how multicellular ...
Alexandria T. Carter, Abigail R. Fabiano, Ehsan Aalaei, Jason Deng, Dakota E. Rostant, Michael R. King   +5 more
wiley   +1 more source