نتایج جستجو برای: porous channel

تعداد نتایج: 272231  

2016
Mohsen Torabi Nader Karimi Kaili Zhang George W. Woodruff

The performance of a two-dimensional, axisymmetric channel with porous inserts attached to the walls is analyzed from the perspective of the first and second laws of thermodynamics. In this analysis, the flow is assumed to be fully developed with a constant heat flux imposed on the external surfaces of the walls, while heat could be internally generated by the fluid and solid phases. Using a Da...

Journal: :Nanotechnology 2008
D Mukherji J Lackner N Wanderka N Kardjilov O Näth S Jäger F Schmitz J Rösler

There is increasing demand to functionalize meso- and nanoporous materials by coating and make the porous substrate biocompatible or environmentally friendly. However, coating on a meso-porous substrate poses great challenges, especially if the pore aspect ratio is high. We adopted the pulsed laser deposition (PLD) method to coat Ni(3)Al-based meso-porous membranes, which were fabricated from a...

Journal: :Dalton transactions 2013
Magnus T Johnson Zoran Džolić Mario Cetina Manu Lahtinen Mårten S G Ahlquist Kari Rissanen Lars Öhrström Ola F Wendt

Understanding the mechanism by which advanced materials assemble is essential for the design of new materials with desired properties. Here, we report a method to form chiral, potentially porous materials through spontaneous resolution of conformers of a PCP pincer palladium complex ({2,6-bis[(di-t-butylphosphino)methyl]phenyl}palladium(II)halide). The crystallisation is controlled by weak hydr...

2013
Magnus T. Johnson Zoran Džolić Mario Cetina Manu Lahtinen Mårten S. G. Ahlquist Kari Rissanen Lars Öhrström Ola F. Wendt

Understanding the mechanism by which advanced materials assemble is essential for the design of new materials with desired properties. Here, we report a method to form chiral, potentially porous materials through spontaneous resolution of conformers of a PCP pincer palladium complex ({2,6-bis[(di-t-butylphosphino)methyl]phenyl}palladium(II)halide). The crystallisation is controlled by weak hydr...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه ارومیه 1390

با توجه به پیشرفت روز افزون سیستم های دیجیتال در همه زمینه های فناوری از جمله مخابرات مدرن و از طرف دیگر ماهیت آنالوگ سیگنالهای موجود در طبیعت نیاز بسیار وسیعی به مبدلهای آنالوگ به دیجیتال و دیجیتال به آنالوگ با مشخصات دینامیک و استاتیک مختلف وجود دارد. از آنجا که مبدلهای آنالوگ به دیجیتال مهمترین گلوگاه در مدارات دیجیتال با ورودی آنالوگ محسوب می شوند از این رو تلاشهای فراوانی برای افزایش سرعت ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده فنی و مهندسی 1388

asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...

2017
Bernardo R. Broitman Benjamin S. Halpern Stefan Gelcich Marco A. Lardies Cristian A. Vargas Felipe Vásquez-Lavín Stephen Widdicombe Silvana N. R. Birchenough

1 Centro de Estudios Avanzados en Zonas Áridas, Facultad de Ciencias del Mar, Universidad Católica del Norte, Coquimbo, Chile, 2 Bren School of Environmental Science and Management, University of California, Santa Barbara, CA, USA, 3 Departamento de Ecología, Pontificia Universidad Católica de Chile, Alameda, Chile, 4 Facultad de Ingeniería y Ciencias and Facultad de Artes Liberales, Universida...

2004
Radovan Václav Pavol Prokop

1) Institute of Zoology, Slovak Academy of Sciences, Dúbravská cesta 9, SK-84506 Bratislava, Slovakia (e-mail: [email protected]) 2) University of Trnava, Faculty of Education, Department of Biology, Priemyselná 4, P.O. Box 9, SK-91843 Trnava, Slovakia (e-mail: [email protected]) 3) Estación Experimental de Zonas Áridas (CSIC), Departamento de Ecología Funcional y Evolutiva, General S...

Journal: :Microelectronics Journal 2005
N. L. Ivina L. K. Orlov V. B. Shevtsov N. A. Alyabina

Recently, porous materials on the base of semiconductor crystals arouse greater interest as photon crystals in terms of opto-electronic applications and formation of arrays of nano-elements with oneand zero-dimensionality. The crystals of porous silicon have been developed best to date. The obvious trends in this field now are towards using other materials for electrolytic etching, decreasing t...

Journal: :The European physical journal. E, Soft matter 2013
Laurent Talon Daniela Bauer

Simulating flow of a Bingham fluid in porous media still remains a challenging task as the yield stress may significantly alter the numerical stability and precision. We present a Lattice-Boltzmann TRT scheme that allows the resolution of this type of flow in stochastically reconstructed porous media. LB methods have an intrinsic error associated to the boundary conditions. Depending on the sch...

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