Computational fluid dynamic simulations of turbulent flow in a rotating cylinder electrode reactor in continuous mode of operation

2016 ◽  
Vol 194 ◽  
pp. 338-345 ◽  
Author(s):  
Mario Rosales ◽  
Tzayam Pérez ◽  
José L. Nava
Keyword(s):  
Turbulent Flow ◽  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Rotating Cylinder ◽  
Continuous Mode ◽  
Dynamic Simulations ◽  
Rotating Cylinder Electrode ◽  
Mode Of Operation

Bilge Keel Loads and Hull Induced Pressures: Experimental Results and CFD Validation

2015 ◽  
Author(s):  
Riaan van ‘t Veer ◽  
Xavier Schut ◽  
Jean-Luc Pelerin
Keyword(s):  
Computational Fluid Dynamic ◽  
Normal Force ◽  
Fluid Dynamic ◽  
Rotating Cylinder ◽  
Forced Oscillations ◽  
Pressure Jump ◽  
Dynamic Simulations ◽  
Cfd Validation ◽  
Higher Harmonic ◽  
Bilge Keel

This paper present results obtained in an experiment with a rotating cylinder to which a single bilge keel was fitted. Forced oscillations were performed leading to a KC range between 1 and 16. The loads acting on the bilge keel were measured as well as the vortex induced hull pressures in the vicinity of the bilge keel. Computational Fluid Dynamic simulations were conducted with a 2D representation of the experiment. Good correlation in the bilge keel loads and vortex induced pressures is obtained. Using Fourier analysis the first and first two higher harmonic (3ω and 5ω) drag and inertia coefficients of the bilge keel load were calculated. It is shown that the higher harmonic drag and inertia terms are essential to obtain a good load representation. The vortex induced pressure in front of the moving bilge keel is found to be KC independent. The pressure jump over the bilge keel can be correlated to the instantaneous normal force on the bilge keel. In the wake of the moving bilge keel the pressure depend on KC. These findings are in agreement with the observations reported by Ikeda et al. [1].

Towards real-time fire data synthesis using numerical simulations

2021 ◽  
pp. 073490412199344
Author(s):  
Wolfram Jahn ◽  
Frane Sazunic ◽  
Carlos Sing-Long
Keyword(s):  
Real Time ◽  
Computational Fluid Dynamic ◽  
Dynamic Models ◽  
Fluid Dynamic ◽  
Near Field ◽  
Computing Time ◽  
Temperature Correction ◽  
Dynamic Simulations ◽  
Conservation Of Energy ◽  
Fire Scenarios

Synthesising data from fire scenarios using fire simulations requires iterative running of these simulations. For real-time synthesising, faster-than-real-time simulations are thus necessary. In this article, different model types are assessed according to their complexity to determine the trade-off between the accuracy of the output and the required computing time. A threshold grid size for real-time computational fluid dynamic simulations is identified, and the implications of simplifying existing field fire models by turning off sub-models are assessed. In addition, a temperature correction for two zone models based on the conservation of energy of the hot layer is introduced, to account for spatial variations of temperature in the near field of the fire. The main conclusions are that real-time fire simulations with spatial resolution are possible and that it is not necessary to solve all fine-scale physics to reproduce temperature measurements accurately. There remains, however, a gap in performance between computational fluid dynamic models and zone models that must be explored to achieve faster-than-real-time fire simulations.

Computational fluid dynamic simulations of coal-fired utility boilers: An engineering tool

Fuel ◽  
2009 ◽  
Vol 88 (1) ◽  
pp. 9-18 ◽  
Author(s):  
Efim Korytnyi ◽  
Roman Saveliev ◽  
Miron Perelman ◽  
Boris Chudnovsky ◽  
Ezra Bar-Ziv
Keyword(s):  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Dynamic Simulations ◽  
Utility Boilers

scholarly journals Computational fluid dynamic simulations of a cavopulmonary assist device for failing Fontan circulation

2019 ◽  
Vol 158 (5) ◽  
pp. 1424-1433.e5 ◽  
Author(s):  
W.C. Patrick Lin ◽  
Matthew G. Doyle ◽  
S. Lucy Roche ◽  
Osami Honjo ◽  
Thomas L. Forbes ◽  
...  
Keyword(s):  
Computational Fluid Dynamic ◽  
Fluid Dynamic ◽  
Fontan Circulation ◽  
Assist Device ◽  
Dynamic Simulations ◽  
Cavopulmonary Assist Device ◽  
Failing Fontan
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