Thermodiffusion in multicomponent hydrocarbon mixtures: Experimental investigations and computational analysis

2009 ◽  
Vol 131 (11) ◽  
pp. 114505 ◽  
Author(s):  
Stefan VanVaerenbergh ◽  
Seshasai Srinivasan ◽  
M. Ziad Saghir
Keyword(s):  
Computational Analysis ◽  
Experimental Investigations ◽  
Hydrocarbon Mixtures

scholarly journals Experimental Investigations and Computational Analysis on Subsonic Wind Tunnel

2019 ◽  
Vol Volume-3 (Issue-3) ◽  
pp. 1708-1711
Author(s):  
Rishabh Kumar Sahu ◽  
Saurabh Sharma ◽  
Vivek Swaroop | Vishal Kumar ◽  
Keyword(s):  
Wind Tunnel ◽  
Computational Analysis ◽  
Experimental Investigations ◽  
Subsonic Wind Tunnel

scholarly journals Anion-π Catalysis Enabled by the Mechanical Bond

2021 ◽  
Author(s):  
John Maynard ◽  
Bartomeu Galmés ◽  
Athanasios Stergiou ◽  
Mark Symes ◽  
Antonio Frontera ◽  
...  
Keyword(s):  
Michael Addition ◽  
Computational Analysis ◽  
Experimental Investigations ◽  
Mechanical Bond ◽  
Brønsted Base

We report a series of rotaxane-based anion-π catalysts in which the mechanical bond between a bipyridine macrocycle and an axle containing an NDI unit is intrinsic to the activity observed, including a [3]rotaxane that catalyses an otherwise disfavoured Michael addition in >60 fold selectivity over a competing decarboxylation pathway that dominates under Brønsted base conditions. The results are rationalized by detailed experimental investigations, electrochemical and computational analysis.

Soret Measurement for Multi-Component Hydrocarbon Mixtures from Space Experiment Conducted Onboard FOTON M3 Unmanned Satellite

2012 ◽  
Vol 225 ◽  
pp. 470-474 ◽  
Author(s):  
M. Ziad Saghir ◽  
Seshasai Srinivasan ◽  
Stefan Van Vaerenbergh
Keyword(s):  
Experimental Investigation ◽  
Space Experiment ◽  
Experimental Investigations ◽  
Hydrocarbon Mixture ◽  
Hydrocarbon Mixtures ◽  
Component System ◽  
Thermodiffusion Coefficient ◽  
Free Environment ◽  
Theoretical Results ◽  
Good Agreement

In an unprecedented experimental investigation, a binary, a ternary and a four-component hydrocarbon mixture at different pressure have been studied in a nearly convection free environment to understand the thermodiffusion process. Experimental investigations of the mixtures have been conducted in space onboard the spacecraft FOTON-M3. The experiment objective was to measure the thermodiffusion coefficient for multi-component hydrocarbon mixtures. Then the experimental results have also been used to test a thermodiffusion model that has been calibrated based on the results of previous experimental investigations. Results showed a good agreement with current theoretical results except for the four-component system where discrepancies were found and discussed.

scholarly journals Hysteretically Symmetrical Evolution of Elastomers-Based Vibration Isolators within α-Fractional Nonlinear Computational Dynamics

Symmetry ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 924 ◽  
Author(s):  
Nastac ◽  
Debeleac ◽  
Vlase
Keyword(s):  
Fractional Order ◽  
Rheological Model ◽  
Fractional Derivatives ◽  
Computational Analysis ◽  
Nonlinear Models ◽  
Hysteretic Behavior ◽  
Experimental Investigations ◽  
Vibration Isolators ◽  
Computational Dynamics ◽  
Classical Models

This study deals with computational analysis of vibration isolators' behavior, using the fractional-order differential equations (FDE). Numerical investigations regarding the influences of α-fractional derivatives have been mainly focused on the dissipative component within the differential constitutive equation of rheological model. Two classical models were considered, Voigt-Kelvin and Van der Pol, in order to develop analyses both on linear and nonlinear formulations. The aim of this research is to evaluate the operational capability, provided by the α-fractional derivatives within the viscous component of certain rheological model, to enable an accurate response regarding the realistic behavior of elastomeric-based vibration isolators. The hysteretic response followed, which has to be able to assure the symmetry of dynamic evolution under external loads, and at the same time, properly providing dissipative and conservative characteristics in respect of the results of experimental investigations. Computational analysis was performed for different values of α-fractional order, also taking into account the integer value, in order to facilitate the comparison between the responses. The results have shown the serviceable capability of the α-fractional damping component to emulate, both a real dissipative behavior, and a virtual conservative characteristic, into a unitary way, only by tuning the α-order. At the same time, the fractional derivative models are able to preserve the symmetry of hysteretic behavior, comparatively, e.g., with rational-power nonlinear models. Thereby, the proposed models are accurately able to simulate specific behavioral aspects of rubber-like elastomers-based vibration isolators, to the experiments.

Modulating Hardness in Sc2(Ru5-xTMx)B4 through Empirical Considerations and Computational Analysis

2022 ◽  
Author(s):  
Jacob Hickey ◽  
Jakoah Brgoch
Keyword(s):  
Computational Analysis ◽  
Higher Order ◽  
Experimental Investigations ◽  
Hard Materials

Ternary and higher-order borides remain an underexplored area in the search for hard materials. The difficulties associated with purely systematic experimental investigations have largely hindered the consideration of such complex...

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