Sensitivity analysis of a concentration fluctuation model to dissipation rate estimates

2012 ◽  
Vol 48 (1/2/3/4) ◽  
pp. 164 ◽  
Author(s):  
Andrea Amicarelli ◽  
Pietro Salizzoni ◽  
Giovanni Leuzzi ◽  
Paolo Monti ◽  
Lionel Soulhac ◽  
...  
Keyword(s):  
Sensitivity Analysis ◽  
Dissipation Rate ◽  
Concentration Fluctuation ◽  
Fluctuation Model

scholarly journals A predictive model for the diffusion of a highly non-ideal ternary system

2018 ◽  
Vol 20 (27) ◽  
pp. 18436-18446 ◽  
Author(s):  
Tariq Allie-Ebrahim ◽  
Vincenzo Russo ◽  
Ornella Ortona ◽  
Luigi Paduano ◽  
Riccardo Tesser ◽  
...  
Keyword(s):  
Ternary System ◽  
Predictive Model ◽  
Ternary Mixtures ◽  
Concentration Fluctuation ◽  
System P ◽  
Dynamic Concentration ◽  
Fluctuation Model

The Maxwell–Stefan and dynamic concentration fluctuation models were compared in predicting mutual diffusivity in non-ideal ternary mixtures. The dynamic concentration fluctuation model gives improved predictions.

Test of a New Concentration Fluctuation Model for Decision-Makers

1996 ◽  
pp. 285-293 ◽  
Author(s):  
Per Løfstrøm ◽  
Hans Jørgensen ◽  
Erik Lyck ◽  
Torben Mikkelsen
Keyword(s):  
Decision Makers ◽  
Concentration Fluctuation ◽  
Fluctuation Model

scholarly journals Sensitivity Analysis of Maximum Circulation of Wake Vortex Encountered by En-Route Aircraft

Aerospace ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 194
Author(s):  
Jose I. Rojas ◽  
Marc Melgosa ◽  
Xavier Prats
Keyword(s):  
Sensitivity Analysis ◽  
Dissipation Rate ◽  
Wake Vortex ◽  
Load Factor ◽  
Core Radius ◽  
Operational Conditions ◽  
Initial Strength ◽  
Efficient Test ◽  
Aircraft Data ◽  
Comprehensive Study

Wake vortex encounters (WVE) can pose significant hazard for en-route aircraft. We studied the sensitivity of wake vortex (WV) circulation and decay to aircraft mass, altitude, velocity, density, time of catastrophic wake demise event, eddy dissipation rate, wing span, span-wise load factor, and WV core radius. Then, a tool was developed to compute circulations of WV generated/encountered by aircraft en-route, while disregarding unrealistic operational conditions. A comprehensive study is presented for most aircraft in the Base of Aircraft Data version 4.1 for different masses, altitudes, speeds, and separation values between generator and follower aircraft. The maximum WV circulation corresponds to A380-861 as generator: 864 and 840 m2/s at horizontal separation of 3 and 5 NM, respectively. In cruise environment, these WV may descend 1000 ft in 2.6 min and 2000 ft in 6.2 min, while retaining 74% and 49% of their initial strength, respectively. The maximum circulation of WV encountered by aircraft at horizontal separation of 3 NM from an A380-861 is 593, 726, and 745 m2/s, at FL200, FL300, and FL395, respectively. At 5 NM, the circulations decrease down to 578, 708, and 726 m2/s. Our results allow reducing WVE simulations only to critical scenarios, and thus perform more efficient test programs for computing aircraft upsets en-route.

Segmental dynamics of miscible polymer blends: Comparison of the predictions of a concentration fluctuation model to experiment

1999 ◽  
Vol 111 (13) ◽  
pp. 6121-6128 ◽  
Author(s):  
Sudesh Kamath ◽  
Ralph H. Colby ◽  
Sanat K. Kumar ◽  
Kostas Karatasos ◽  
George Floudas ◽  
...  
Keyword(s):  
Polymer Blends ◽  
Concentration Fluctuation ◽  
Segmental Dynamics ◽  
Miscible Polymer Blends ◽  
Fluctuation Model
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