scholarly journals Determination of braking force on the aerodynamic brake by numerical simulations

2014 ◽  
Vol 42 (2) ◽  
pp. 106-111 ◽  
Author(s):  
Mirjana Puharic ◽  
Dusan Matic ◽  
Suzana Linic ◽  
Slavica Ristic ◽  
Vojkan Lucanin
Author(s):  
Danilo Machado Lawinscky da Silva ◽  
Rodrigo Almeida Bahiense ◽  
Breno Pinheriro Jacob ◽  
Fernando Gomes da Silva Torres ◽  
Antonio Roberto Medeiros ◽  
...  

Conventional offshore pipeline installation operations in Brazil have been performed in an S-Lay procedure employing the BGL-1 barge, owned by Petrobras. However, this procedure has some limits, and may not be feasible in some particular scenarios. Therefore, the objective of this work is to present the numerical simulation of an alternative pipeline installation procedure. This procedure basically consists of performing the pipeline assembly on shore, and deflecting it to the sea using a tug boat. The numerical simulations employ the SITUA-Prosim computational tool, which is able to incorporate the correct definition of the seabed and shore from bathymetric curves. An actual pipeline installation by this lateral deflection procedure is analyzed and discussed. The characterization of the procedure passes through the determination of the better velocity and direction of the tug boat in order to minimize the efforts on the pipeline (especially due to the curvatures).


2019 ◽  
Vol 26 (5) ◽  
pp. 629-637 ◽  
Author(s):  
A. V. Boiko ◽  
K. V. Demyanko ◽  
A. A. Inozemtsev ◽  
S. V. Kirilovskiy ◽  
Yu. M. Nechepurenko ◽  
...  

2012 ◽  
Vol 2012 ◽  
pp. 1-34 ◽  
Author(s):  
L. J. Sanchez Vallejo ◽  
J. M. Ovejero ◽  
R. A. Fernández ◽  
S. A. Dassie

The main aspects related to the charge transfer reactions occurring at the interface between two immiscible electrolyte solutions (ITIES) are described. The particular topics to be discussed involve simple ion transfer. Focus is given on theoretical approaches, numerical simulations, and experimental methodologies. Concerning the theoretical procedures, different computational simulations related to simple ion transfer are reviewed. The main conclusions drawn from the most accepted models are described and analyzed in regard to their relevance for explaining different aspects of ion transfer. We describe numerical simulations implementing different approaches for solving the differential equations associated with the mass transport and charge transfer. These numerical simulations are correlated with selected experimental results; their usefulness in designing new experiments is summarized. Finally, many practical applications can be envisaged regarding the determination of physicochemical properties, electroanalysis, drug lipophilicity, and phase-transfer catalysis.


2015 ◽  
Vol 732 ◽  
pp. 59-62
Author(s):  
Petr Horník

Finite-element (FE) analysis is important instrument for prediction of plastic car bumper tests. Accuracy of FE analysis depends on accuracy of material input data. It has developed experimental methodology for identification of mechanical properties. The methodology leads to more accurate material input data for numerical simulations.


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