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On the search of more stable second-order lattice-Boltzmann schemes in confined flows
(Elsevier Inc, 2015-04)
The von Neumann linear analysis, restricted by a heuristic selection of wave-number vectors was applied to the search of explicit lattice Boltzmann schemes which exhibit more stability than existing methods. The relative ...
Compressible modes in a square lid-driven cavity
(Elsevier B.V., 2015-07-01)
This paper studies the effect of compressibility on the linear stability of a two-dimensional lid-driven cavity flow in the subsonic regime. The base flow is generated by high fidelity direct numerical simulation and a ...
Stabilized finite element method based on local preconditioning for unsteady compressible flows in deformable domains with emphasis on the low Mach number limit application
(John Wiley & Sons Ltd, 2012)
Flows with low Mach numbers represent a limit situation in the solution of compressible flows. The preconditioning of flow equations is one of the classical approaches proposed to capture the solution in the low Mach number ...
Unsaturated Infinite Slope Stability Considering Surface Flux Conditions
(ASCE-AMER SOC CIVIL ENGINEERS, 2010)
A slope stability model is derived for an infinite slope subjected to unsaturated infiltration flow above a phreatic surface. Closed form steady state solutions are derived for the matric suction and degree of saturation ...
Analysis of the Influence of IPFC-POD and PSS controllers coordinated tuning by an Adaptive Genetic Algorithm with Hyper-mutation
(Ieee, 2018-01-01)
Small-magnitude disturbances happen to produce electro-mechanical oscillations which should be damped as quickly as possible to ensure reliability and stability of electrical power system (EPS). Flexible AC transmission ...
Analysis of the Influence of IPFC-POD and PSS controllers coordinated tuning by an Adaptive Genetic Algorithm with Hyper-mutation
(2019-01-07)
Small-magnitude disturbances happen to produce electro-mechanical oscillations which should be damped as quickly as possible to ensure reliability and stability of electrical power system (EPS). Flexible AC transmission ...
Numerical study of the square-root conformation tensor formulation for confined and free-surface viscoelastic fluid flows
(2016-12-01)
We present a numerical study of a stabilization method for computing confined and free-surface flows of highly elastic viscoelastic fluids. In this approach, the constitutive equation based on the conformation tensor, which ...
A geometric interpretation for transmission real losses minimization through the optimal power flow and its influence on voltage collapse
(Elsevier B.V., 2002-06-28)
This work presents an approach for geometric solution of an optimal power flow (OPF) problem for a two bus system (a slack and a PV busses). Additionally, the geometric relationship between the losses minimization and the ...
A geometric interpretation for transmission real losses minimization through the optimal power flow and its influence on voltage collapse
(Elsevier B.V., 2002-06-28)
This work presents an approach for geometric solution of an optimal power flow (OPF) problem for a two bus system (a slack and a PV busses). Additionally, the geometric relationship between the losses minimization and the ...
Compressible modes in a square lid-driven cavity
(Elsevier B.V., 2015)