Results 81 to 90 of about 127,967 (248)

Numerical simulations of fluid flows and heat transfer in melt pools of Directed Energy Deposition of SS316L [PDF]

E3S Web of Conferences
This paper presents the numerical model developed to simulate fluid flow and heat transfer in melt pools formed in Directed Energy Deposition of stainless steel SS316L. The model incorporated important heat and momentum source terms.
Saldi Zaki, Pasang Tim, Khogres Winston, Budiman Arief, Gunawan Fergyanto   +4 more
doaj   +1 more source

Correct energy evolution of stabilized formulations: The relation between VMS, SUPG and GLS via dynamic orthogonal small-scales and isogeometric analysis. II: The incompressible Navier-Stokes equations

, 2018
This paper presents the construction of a correct-energy stabilized finite element method for the incompressible Navier-Stokes equations. The framework of the methodology and the correct-energy concept have been developed in the convective--diffusive ...
Akkerman, I., Eikelder, M. Ten
core   +1 more source

Elastomeric Micro‐Balloons for Remote Control of Cerebral Blood Flow and Real‐Time In vivo Imaging of Rodent Brain Response to Hypoperfusion

Advanced Materials, EarlyView.
This study reports the fabrication of MRI‐compatible elastomeric micro‐balloons via a multi‐step bubble casting process, where the monolithic elastomeric wall is selectively stiffened for reversible and controlled inflation and elasticity, depending on the target vessels for graded occlusion of cerebral arteries.
Jong Bin Kim, Jinghui Wang, Yinding Chi, Jingxian Wu, Alicia Ng, Guanda Qiao, Honglin Tan, Miroslaw Janowski, Piotr Walczak, Yajie Liang, Shu Yang   +10 more
wiley   +1 more source

Positively Charged Polymer‐Brush MOFs for Large‐Area, Pressure‐Resistant Gas Separation Membranes

Advanced Materials, EarlyView.
A universal POPA strategy enables positively charged polymer‐brush MOFs with self‐adaptive interfacial interlocking to resist aggregation under fast processing. This design ensures seamless dispersion within large‐area selective layers, achieving 1 m‐wide roll‐to‐roll fabrication of pressure‐resistant MMCMs with tunable CO2 separation performance ...
Yi Yang, Ye Yuan, Yuxiu Sun, Fei Shi, Chenyang Song, Weifan Wang, Qinghua Li, Menglong Sheng, Zhihua Qiao, Jingwei Hou, Anthony K. Cheetham, Zhi Wang   +11 more
wiley   +1 more source

Preliminary Results of Heat Transfer from a Stationary and Rotating Ellipsoidal Spinner [PDF]

Convective heat-transfer coefficients in dry air were obtained for an ellipsoidal spinner of 30-inch maximum diameter for both stationary and rotating operation over a range of conditions including airspeeds up to 275 miles per hour, rotational speeds up
vonGlahn, U.
core   +1 more source

Theoretical Models of Sunspot Structure and Dynamics

, 2009
Recent progress in theoretical modeling of a sunspot is reviewed. The observed properties of umbral dots are well reproduced by realistic simulations of magnetoconvection in a vertical, monolithic magnetic field.
A Sainz Dalda, B Montesinos, C Beck, C Westendorp Plaza, DCH Stanchfield II, E Knobloch, EN Parker, GB Scharmer, GB Scharmer, GB Scharmer, HC Spruit, HJ Hagenaar, I Márquez, J Jurc̆ák, JC del Toro Iniesta, JH Thomas, JH Thomas, JH Thomas, JH Thomas, JM Borrero, JM Borrero, JM Borrero, K Ichimoto, K Langhans, K Langhans, L Bharti, L Bharti, LR Bellot Rubio, M Rempel, M Schüssler, M Sobotka, M Sobotka, MJ Penn, NH Brummell, NO Weiss, R Schlichenmaier, R Schlichenmaier, SK Solanki, SK Solanki, T Heinemann, TR Rimmele   +40 more
core   +1 more source

Beyond Earth: Resilience of Quasi‐2D Perovskite Solar Cells in Space

Advanced Materials, EarlyView.
In the article (DOI: 10.1002/adma.202520433), Christoph Putz and co‐workers demonstrate rigid quasi‐2D perovskite solar cells operating in low Earth orbit, delivering stable power for more than 100 days under real‐space conditions. In‐orbit performance is correlated with extensive ground‐based thermal and proton‐irradiation studies on rigid and ...
Christoph Putz, Lukas E. Lehner, Stepan Demchyshyn, Bekele Hailegnaw, Phillip Jahelka, Magdalena Breitwieser, Sercan Özen, Andrea Denker, Jürgen Bundesmann, Alina Hanna Dittwald, Dilara Karabulut, Philipp Tockhorn, Steve Albrecht, Felix Lang, Markus C. Scharber, Michael D. Kelzenberg, Harry A. Atwater, Martin Kaltenbrunner   +17 more
wiley   +1 more source

Gyroscopic pumping of large-scale flows in stellar interiors, and application to Lithium Dip stars

, 2010
The maintenance of large-scale differential rotation in stellar convective regions by rotationally influenced convective stresses also drives large-scale meridional flows by angular--momentum conservation.
Anthony-Twarog, Bodenheimer, Boesgaard, Boesgaard, Deliyannis, Garaud, Garaud, Garaud, Garaud, Kundu, P. Bodenheimer, P. Garaud, Rüdiger, Schou, Spiegel, Talon, Talon, Zahn   +17 more
core   +1 more source

Elephant‐Skin‐Inspired Porous Cementitious Tiles with Programmable Crack Networks for Passive Cooling

Advanced Materials, EarlyView.
Elephant‐skin‐inspired crack networks are programmed in porous diatomaceous earth (DE)‐cement composites using substrate‐guided, stress‐concentration induced fracture. The resulting crack lattices act as capillary conduits that redistribute water, while the porous matrix stores moisture.
Qingya Huang, Kun‐Hao Yu, Ji Yoon Bae, Yunchan Lee, Dorit Aviv, Shu Yang   +5 more
wiley   +1 more source

Modelling magnetic flux emergence in the solar convection zone

, 2012
[Abridged] Bipolar magnetic regions are formed when loops of magnetic flux emerge at the solar photosphere. Our aim is to investigate the flux emergence process in a simulation of granular convection.
Abbett, Archontis, Archontis, Bushby, Cheung, Cheung, Dorch, Fan, Fan, Magara, Martínez-Sykora, Ossendrijver, P. J. Bushby, Parker, Stein, Tortosa-Andreu, V. Archontis, Zwaan   +17 more
core   +1 more source