Direct synthesis of vanadium incorporated three-dimensional KIT-6: A systematic study in the oxidation of cyclohexane

2008 ◽  
Vol 115 (3) ◽  
pp. 281-292 ◽  
Author(s):  
Balasamy Rabindran Jermy ◽  
Dal-Rae Cho ◽  
Kanattukara Vijayan Bineesh ◽  
Sang-Yun Kim ◽  
Dae-Won Park
Keyword(s):  
Systematic Study ◽  
Direct Synthesis ◽  
Three Dimensional

Systematic Study of Film Cooling With a Three-Dimensional Calculation Procedure

1986 ◽  
Vol 108 (1) ◽  
pp. 124-130 ◽  
Author(s):  
A. O. Demuren ◽  
W. Rodi ◽  
B. Scho¨nung
Keyword(s):  
Systematic Study ◽  
Film Cooling ◽  
Three Dimensional ◽  
Heat Fluxes ◽  
Test Cases ◽  
Cooling Effectiveness ◽  
Film Cooling Effectiveness ◽  
Injection Angle ◽  
The Individual ◽  
Volume Method

The present paper describes three-dimensional calculations of film cooling by injection from a single row of holes. A systematic study of the influence of different parameters on the cooling effectiveness has been carried out. Twenty-seven test cases have been calculated, varying the injection angle (α = 10/45/90 deg), the relative spacing (s/D = 1.5/3/5) and the blowing rate (M = 0.5/1/2) for the same mainstream conditions. The governing three-dimensional equations are solved by a finite volume method. The turbulent stresses and heat fluxes are obtained from a k–ε model modified to account for nonisotropic eddy viscosities and diffusivities. Examples of predicted velocity and temperature distributions are presented and compared with available experimental data. For all the test cases, the laterally averaged cooling effectiveness is given. On the whole, the agreement with experiments is fairly good, even though there are discrepancies about details in some of the cases. The influence of the individual parameters on the film cooling effectiveness is predicted correctly in all cases. This influence is discussed in some detail and the parameter combination with the best overall cooling performance is identified.

Direct synthesis of three-dimensional MWW zeolite with cyclohexylamine as an organic structure-directing agent

2018 ◽  
Vol 6 (26) ◽  
pp. 12244-12249 ◽  
Author(s):  
Weifeng Chu ◽  
Xiujie Li ◽  
Shenglin Liu ◽  
Xiangxue Zhu ◽  
Sujuan Xie ◽  
...  
Keyword(s):  
Direct Synthesis ◽  
Three Dimensional ◽  
Cost Effective ◽  
Hydrothermal Conditions ◽  
Structure Directing Agent ◽  
Organic Structure ◽  
Low Toxicity ◽  
Mww Zeolite

MCM-49 zeolite with a three-dimensional MWW framework was directly synthesized using low-toxicity and cost-effective cyclohexylamine (CHA) as an organic structure-directing agent under hydrothermal conditions.

scholarly journals A systematic study of proto-neutron star convection in three-dimensional core-collapse supernova simulations

2020 ◽  
Vol 492 (4) ◽  
pp. 5764-5779 ◽  
Author(s):  
Hiroki Nagakura ◽  
Adam Burrows ◽  
David Radice ◽  
David Vartanyan
Keyword(s):  
Neutron Star ◽  
Systematic Study ◽  
Three Dimensional ◽  
Three Dimensions ◽  
Core Collapse ◽  
Core Collapse Supernova ◽  
Tau Neutrinos ◽  
The Impact ◽  
Proto Neutron Star

ABSTRACT This paper presents the first systematic study of proto-neutron star (PNS) convection in three dimensions (3D) based on our latest numerical fornax models of core-collapse supernova (CCSN). We confirm that PNS convection commonly occurs, and then quantify the basic physical characteristics of the convection. By virtue of the large number of long-term models, the diversity of PNS convective behaviour emerges. We find that the vigour of PNS convection is not correlated with CCSN dynamics at large radii, but rather with the mass of PNS − heavier masses are associated with stronger PNS convection. We find that PNS convection boosts the luminosities of νμ, ντ, $\bar{\nu }_{\mu }$, and $\bar{\nu }_{\tau }$ neutrinos, while the impact on other species is complex due to a competition of factors. Finally, we assess the consequent impact on CCSN dynamics and the potential for PNS convection to generate pulsar magnetic fields.

Reversible recrystallization process of copper and silver thioacetamide–halide coordination polymers and their basic building blocks

CrystEngComm ◽  
2014 ◽  
Vol 16 (35) ◽  
pp. 8224-8231 ◽  
Author(s):  
J. Troyano ◽  
J. Perles ◽  
P. Amo-Ochoa ◽  
J. I. Martínez ◽  
F. Zamora ◽  
...  
Keyword(s):  
Coordination Polymers ◽  
Direct Synthesis ◽  
Three Dimensional ◽  
Building Blocks ◽  
Recrystallization Process

Three-dimensional [CuX(TAA)]n (X = Br (1), I (2)) and bi-dimensional [AgX(TAA)]n (X = Cl (3), Br (4)) coordination polymers have been isolated by the direct synthesis from copper(i) and silver(i) halides and thioacetamide (TAA).

Direct Synthesis of Cd3OSO4 Nano-particles From a New Three-dimensional Cadmium(II) Coordination Polymer Precursor

2010 ◽  
Vol 21 (1) ◽  
pp. 171-174 ◽  
Author(s):  
Gholam Hossein Shahverdizadeh ◽  
Shahla Masoudian ◽  
Ali Akbar Soudi ◽  
Fahime Bigdeli ◽  
Hassan Hosseini Monfared ◽  
...  
Keyword(s):  
Coordination Polymer ◽  
Direct Synthesis ◽  
Three Dimensional ◽  
Nano Particles ◽  
Polymer Precursor

scholarly journals Documentación sistémica del arte rupestre mediante el análisis espectral del escaneado 3D de las estaciones pintadas en Aragón, El caso concreto del abrigo de La Vacada (Castellote, Teruel) y el covacho del Plano del Pulido (Caspe, Zaragoza). España.

2010 ◽  
Vol 1 (1) ◽  
pp. 123
Author(s):  
María Sebastián López ◽  
Antonio Uriarte González ◽  
Jorge Angás Pajas ◽  
Manuel Martínez-Bea
Keyword(s):  
Systematic Study ◽  
Rock Art ◽  
Three Dimensional ◽  
Laser Scanner ◽  
Variable Intensity ◽  
Three Dimensional Modeling ◽  
Dimensional Modeling ◽  
Cave Paintings ◽  
Compositional Elements

<p>The work that follows is a sample of the tool of 3D laser scanner for the systematic study of rock art. Getting a three-dimensional modeling of the panels that are located in the cave paintings and analyzing variable intensity emitted by the scanner (green or red depending on instrument used). This analysis allows us pigment spots (cave paintings), with alterations of the panel. What allows us to obtain, as is the case, greater sharpness of the compositional elements that have the rock station and detecting non-visible figures at present due to deterioration. Assuming therefore a method of systemic documentation of rock art and promoting the recovery of lost art today.</p>

scholarly journals The Effect of Extended Ball-Milling upon Three-Dimensional and Two-Dimensional Perovskite Crystals Properties

2020 ◽  
Vol 10 (14) ◽  
pp. 4775
Author(s):  
Sara Bonomi ◽  
Vincenza Armenise ◽  
Gianluca Accorsi ◽  
Silvia Colella ◽  
Aurora Rizzo ◽  
...  
Keyword(s):  
Ball Milling ◽  
Structural Transition ◽  
Direct Synthesis ◽  
Three Dimensional ◽  
Blue Shift ◽  
Two Dimensional ◽  
Grinding Method ◽  
Organometal Halide Perovskite ◽  
Crystallite Dimension ◽  
2D And 3D

The ball-milling of materials is a mechanical grinding method that has different effects on treated materials, and can be used for the direct synthesis of organometal halide perovskite (OHP) crystals. Herein, the effect of such a process, extended over a large temporal window, is related to the properties of referential three-dimensional (3D) MAPbI3 (MA = methylammonium) and two-dimensional (2D) PEA2PbI4 (PEA = phenylethylammonium) perovskite crystals. For both 2D and 3D systems, the ball-milling induces a reduction of the crystallite dimension, accompanied by a worsening of the overall crystallinity, but without any sign of amorphization. For MAPbI3, an intriguing room temperature structural transition, from tetragonal to cubic, is observed. The processing in both cases impacts on the morphology, with a reduction of the crystal shape quality connected to the particles’ agglomeration tendency. All these effects translate to a “blue shift” of the absorption and emission features, suggesting the use of this technique to modulate the 3D and 2D OHPs’ properties.

Sensitivity of Three Sensor Hot Wire Probe to Yaw and Pitch Angle Variation

1988 ◽  
Vol 110 (2) ◽  
pp. 120-122 ◽  
Author(s):  
B. Lakshminarayana ◽  
R. Davino
Keyword(s):  
Flow Field ◽  
Systematic Study ◽  
Pitch Angle ◽  
Three Dimensional ◽  
Hot Wire ◽  
Three Dimensional Flow ◽  
Angle Variation ◽  
Wire Probe ◽  
Response Equation ◽  
Single Sensor

The use of a three sensor hot wire probe for the measurement of three-dimensional flow field is increasing rapidly. This probe is very sensitive to yaw and pitch angle variations and existing laws for single sensor wires cannot be utilized to provide the correct hotwire response equations. A systematic study at various yaw and pitch angles (maximum values of ± 40 deg, nearly 220 different yaw and pitch angles) is carried out to determine the nature of response of a triple sensor hot wire probe. These results are analyzed to provide a correlation for the hot wire response equation which includes both pitch and yaw angles as variables.

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