14 citations · 18 across the 9 of their papers we have counts for
10 papers
Stress-divergence, Laplacian, and rotational forms of the incompressible Navier--Stokes equations with variable viscosity
Benjamin Cisternas, Douglas R. Q. Pacheco, Felipe Galarce +1
In the Navier--Stokes equations, incompressibility allows rewriting the viscous term in various forms leading to distinct numerical properties and flow descriptions. Furthermore, m…
A term-by-term variational multiscale method with dynamic subscales for incompressible turbulent aerodynamics
Diego Escobar, Douglas Pacheco, Alejando Aguirre +1
Variational multiscale (VMS) methods offer a robust framework for handling under-resolved flow scales without resorting to problem-specific turbulence models. Here, we propose and…
Improving performance estimation of a PCM-integrated solar chimney through reduced-order based data assimilation
Diego R. Rivera, Ernesto Castillo, Felipe Galarce +1
This study evaluates a data assimilation framework based on reduced-order modeling (ROM-DA), complemented by a hybrid data-filling strategy, to reconstruct dynamic temperature fiel…
Higher-Order Discontinuous Galerkin Splitting Schemes for Fluids with Variable Viscosity
Richard Schussnig, Niklas Fehn, Douglas Ramalho Queiroz Pacheco +1
This article investigates matrix-free higher-order discontinuous Galerkin discretizations of the Navier--Stokes equations for incompressible flows with variable viscosity. The visc…
A fully segregated and unconditionally stable IMEX scheme for dispersed multiphase flows
Douglas Pacheco, Richard Schussnig
Euler--Euler or volume-averaged Navier--Stokes equations are used in various applications to model systems with two or more interpenetrating phases. Each fluid obeys its own moment…
Consistent splitting SAV schemes for finite element approximations of incompressible flows
Douglas R. Q. Pacheco
Consistent splitting schemes are among the most accurate pressure segregation methods, incurring no splitting errors or spurious boundary conditions. Nevertheless, their theoretica…
A fast food-freezing temperature estimation framework using optimally located sensors
Felipe Galarce, Diego Rivera, Douglas Pacheco +2
This article presents and assesses a framework for estimating temperature fields in real time for food-freezing applications, significantly reducing computational load while ensuri…
Fully consistent lowest-order finite element methods for generalised Stokes flows with variable viscosity
Felipe Galarce, Douglas R. Q. Pacheco
Variable viscosity arises in many flow scenarios, often imposing numerical challenges. Yet, discretisation methods designed specifically for non-constant viscosity are few, and the…
Unconditionally stable, linearised IMEX schemes for incompressible flows with variable density
Nicolás Espinoza-Contreras, Gabriel Barrenechea, Ernesto Castillo +1
For the incompressible Navier--Stokes system with variable density and viscosity, we propose and analyse an IMEX framework treating the convective and diffusive terms semi-implicit…
Implicit-explicit schemes for incompressible flow problems with variable viscosity
Gabriel R. Barrenechea, Ernesto Castillo, Douglas R. Q. Pacheco
In this work we study different Implicit-Explicit (IMEX) schemes for incompressible flow problems with variable viscosity. Unlike most previous work on IMEX schemes, which focuses…