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Gradient flows, second-order gradient systems and convexity
(Society for Industrial and Applied Mathematics Publications, 2018)
We disclose an interesting connection between the gradient flow of a C
2
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smooth function ψ and evanescent orbits of the second order gradient system defined
by the square-norm of ∇ψ, under adequate convexity assumption. ...
Simulador de escoamento multifásico em poços de petróleo (SEMPP)
(Universidade Federal do Rio Grande do NorteBRUFRNPrograma de Pós-Graduação em Ciência e Engenharia do PetróleoPesquisa e Desenvolvimento em Ciência e Engenharia de Petróleo, 2013-02-07)
The multiphase flow occurrence in the oil and gas industry is common throughout fluid
path, production, transportation and refining. The multiphase flow is defined as flow
simultaneously composed of two or more phases ...
Experimental investigation on liquid-liquid-gas flow: Flow patterns and pressure-gradient
(Elsevier Science BvAmsterdamHolanda, 2009)
Hessian Riemannian gradient flows in convex programming
(SIAM PUBLICATIONS, 2004)
In view of solving theoretically constrained minimization problems, we investigate the properties of the gradient flows with respect to Hessian Riemannian metrics induced by Legendre functions. The first result characterizes ...
Analytical solution for transient one-dimensional couette flow considering constant and time-dependent pressure gradients
(2011)
This paperaims to determine the velocity profile, in transient state, for a parallel incompressible flow known as Couette flow. The Navier-Stokes equations were applied upon this flow. Analytical solutions, based in Fourier ...
Reduced gradient method combined with augmented Lagrangian and barrier for the optimal power flow problem
(ELSEVIER SCIENCE INC, 2008)
A new approach for solving the optimal power flow (OPF) problem is established by combining the reduced gradient method and the augmented Lagrangian method with barriers and exploring specific characteristics of the relations ...
A model for thermal gradient and heat flow in central Chile: The role of thermal properties
(Elsevier Ltd, 2019)
The aim of this work is to quantify variations in heat flow and thermal gradient patterns at the latitude of central Chile and to evaluate the role of thermal properties of macro-geological units within the lithosphere. ...
FAST SCANNING HADAMARD SPECTROPHOTOMETER
(Soc Applied SpectroscopyFrederick, 1992)
Geothermal gradients and heat flow in Norte Basin of Uruguay
(Laboratório de Geotermia do Observatório Nacional (Brasil), 2020)
Progress obtained in a partial update of geothermal gradient and terrestrial heat flow values for the Norte Basin (Uruguay) are presented. It is based on results of temperature measurements carried out in deep water wells. ...