Results 71 to 80 of about 760,958 (323)

A localised subgrid scale model for fluid dynamical simulations in astrophysics II: Application to type Ia supernovae

, 2006
The dynamics of the explosive burning process is highly sensitive to the flame speed model in numerical simulations of type Ia supernovae. Based upon the hypothesis that the effective flame speed is determined by the unresolved turbulent velocity ...
Hillebrandt, W., Niemeyer, J. C., Roepke, F. K., Schmidt, W.   +3 more
core   +1 more source

Mimicking Block Copolymer Self‐Assembly with One‐Pot Synthesized Polyphosphoester Gradient Copolymers

Advanced Functional Materials, EarlyView.
Degradable Polyphosphoester (PPE) gradient copolymers (GCPs) are synthesized via one‐pot copolymerization. We show that GCPs self‐assemble into nanostructures like polymersomes, effectively mimicking the behavior of traditional BCPs. The gradient strength is key, with softer gradients favoring micelles.
Suna Azhdari, Timo Rheinberger, Ulrich Mansfeld, Yorick Post, Jürgen Linders, Olga Koshkina, André H. Gröschel, Frederik R. Wurm   +7 more
wiley   +1 more source

Large eddy simulation and calculation of propagation characteristics of hydrogen flame under obstacle conditions

You-qi chuyun
[Objective] Compared with conventional gas fuel, hydrogen is more susceptible to explosion. Meanwhile, the existence of obstacles notably stimulates hydrogen combustion and accelerates flame propagation, causing more serious consequences of accidents. To
LI Xiang, WANG Jun, SONG Caiyu, MEI Yuan, SHUAI Jian, ZHANG Guangxue, LI Yuntao   +6 more
doaj   +1 more source

Impact of Radiative Losses on Flame Acceleration and Deflagration to Detonation Transition of Lean Hydrogen-Air Mixtures in a Macro-Channel with Obstacles

Fluids, 2018
While there has been some recognition regarding the impact of thermal boundary conditions (adiabatic versus isothermal) on premixed flame propagation mechanisms in micro-channels (hydraulic diameters <10 mm), their impact in macro-channels has often ...
Gautham Krishnamoorthy, Lucky Nteke Mulenga   +1 more
doaj   +1 more source

Coagulative Granular Hydrogels with an Enzyme Catalyzed Fibrin Network for Endogenous Tissue Regeneration

Advanced Healthcare Materials, EarlyView.
Coagulative granular hydrogels are composed of packed thrombin‐functionalized microgels that catalyze the conversion of fibrinogen into a secondary fibrin network, filling the interstitial voids. This bio‐inspired approach stabilizes the biomaterial to match the robustness of bulk hydrogels without compromising injectability, mimicking the initial ...
Zhipeng Deng, Camila B. Tovani, Simona Bianco, Gianni Comandini, Aya Elghajiji, Mina Aleemardani, Roxana Moscalu, Jeremie Zappia, Bianca Fernandes, Olivia Annett, Chrissy L. Hammond, Jason Wong, Dave J. Adams, Fabrizio Scarpa, Michael R. Whitehouse, Annela M. Seddon, James P. K. Armstrong   +16 more
wiley   +1 more source

Prediction of explosion dynamics of H2/NH3/Air using large eddy simulation and thickened flame model

Case Studies in Thermal Engineering
To enhance the safety of hydrogen-ammonia fuel utilization, this study explores the complicated relationship between hydrogen content (α(H2)) and explosion dynamics.
Xi Chen, Qianhang Jia, Shoukun Xu, Kai Zheng, Ming Peng   +4 more
doaj   +1 more source

Numerical Simulation of Hot Jet Detonation with Different Ignition Positions

Applied Sciences, 2019
Ignition position is an important factor affecting flame propagation and deflagration-to-detonation transition (DDT). In this study, 2D reactive Navier−Stokes numerical studies have been performed to investigate the effects of ignition position on ...
Hongtao Zheng, Shizheng Liu, Ningbo Zhao, Xiang Chen, Xiongbin Jia, Zhiming Li   +5 more
doaj   +1 more source

Multi-dimensional numerical simulations of type Ia supernova explosions

, 2008
The major role type Ia supernovae play in many fields of astrophysics and in particular in cosmological distance determinations calls for self-consistent models of these events.
Roepke, F. K.
core   +1 more source

Dual‐Functional Polyphosphoesters for Gene Delivery: Synergistic Effects of Guanidinium and Hydrophobic Side Chains in Degradable Polymers

Advanced Healthcare Materials, EarlyView.
This study presents guanidinium‐ and indole‐functionalized polyphosphoesters as degradable, non‐viral gene delivery vectors. Through precise tuning of charge density and hydrophobicity, these polymers form stable polyplexes with low toxicity. Remarkably, minor structural changes yield up to 200‐fold differences in transfection efficiency, highlighting ...
Markus Kötzsche, Andreas Dzierza, Jan Egger, Timo Rheinberger, Christin Weilandt, Frederik R. Wurm, Ivo Nischang, Dagmar Fischer, Kalina Peneva   +8 more
wiley   +1 more source

Purpose‐Adaptable Reinforced 3D Hyaluronic‐Acid Based Platform to Study Pathomechanisms of the Central Nervous System

Advanced Healthcare Materials, EarlyView.
Platform system to create biofabricated 3D spinal cord tissue models: Combining high resolution PCL fiber placement, a customized, hyaluronic acid‐based hydrogel, two cell types (spinal cord neurons and astrocytes) together with three distinct laminin isoforms allow the formation of functional cell–cell network interactions.
Nicoletta Murenu, Esra Tuerker, Anna‐Lena Wiessler, Jessica Faber, Ievgenii Liashenko, Jeanette Weigelt, Jörg Tessmar, Paul D. Dalton, Sibylle Jablonka, Mateo S. Andrade Mier, Carmen Villmann, Silvia Budday, Natascha Schaefer   +12 more
wiley   +1 more source