Zobrazeno 1 - 10
of 80
pro vyhledávání: '"Leonardo S. de B. Alves"'
Autor:
Juan C. Assis, Ricardo D. Santos, Mateus S. Schuabb, Carlos E. G. Falcão, Rômulo B. Freitas, Leonardo S. de B. Alves
Publikováno v:
Fluids, Vol 9, Iss 6, p 133 (2024)
Creating time-marching unsteady governing equations for a steady state in high-speed flows is not a trivial task. Residue convergence in time cannot be achieved when using most low- and high-order spatial discretization schemes. Recently, high-order,
Externí odkaz:
https://doaj.org/article/1d6a8e36520648a9a1771652da8123d3
Publikováno v:
Journal of Fluid Mechanics. 961
A linear stability analysis is employed to investigate thermal effects in shear flows. The cases analysed consist of unstably stratified horizontal boundary layers under a mixed convection regime, where forced and free convection mechanisms compete.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::492eef4217402163b8695de5ccc70c80
https://doi.org/10.1017/jfm.2023.226
https://doi.org/10.1017/jfm.2023.226
Publikováno v:
Applied Numerical Mathematics. 159:204-220
Selecting between explicit and implicit time marching schemes, as well as non-iterative explicit-implicit ones, is well understood on a linear stability basis. Implicit schemes are favored when either searching for steady-states or performing time ac
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f0723dd1b78c2c66b07d675745dddccf
https://doi.org/10.1016/j.apnum.2020.09.007
https://doi.org/10.1016/j.apnum.2020.09.007
Publikováno v:
Transport in Porous Media
Transport in Porous Media, 2020, 132 (1), pp.135-155. ⟨10.1007/s11242-020-01383-3⟩
Transport in Porous Media, 2020, 132 (1), pp.135-155. ⟨10.1007/s11242-020-01383-3⟩
A linear stability analysis for the onset of mixed convection in a saturated porous medium through an absolute instability of both two- and three-dimensional disturbances is performed. Relevant control parameters associated with the inclined temperat
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8759dfb97b56bcdd1775e3bbc997313a
https://doi.org/10.1007/s11242-020-01383-3
https://doi.org/10.1007/s11242-020-01383-3
Publikováno v:
Journal of the Brazilian Society of Mechanical Sciences and Engineering. 43
As far as the authors are aware, low Mach preconditioned density-based methods found in the peer-reviewed literature only employ multi-step schemes for physical-time integration. This essentially limits the maximum achievable temporal accuracy-order
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::552cf39efdbf71144e7ee2d9fafcd275
https://doi.org/10.1007/s40430-021-03055-9
https://doi.org/10.1007/s40430-021-03055-9
Publikováno v:
Transport in Porous Media. 130:613-625
The onset of convection in a porous layer saturated by a power-law fluid is here investigated. The walls are considered to be isothermal, isobaric and permeable in such a way that a vertical throughflow is described. The threshold for a buoyancy-driv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::341ea4144448c2661050dd5990966fde
https://doi.org/10.1007/s11242-019-01328-5
https://doi.org/10.1007/s11242-019-01328-5
Publikováno v:
Physical Review Fluids. 6
An inviscid and planar mixing-layer analogy has been recently developed to qualitatively identify the transverse jet transition from convectively to absolutely unstable. We have shown that introducing Reynolds number effects on the disturbance behavi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c0762c417c74a3690a2422658890e17b
https://doi.org/10.1103/physrevfluids.6.l041901
https://doi.org/10.1103/physrevfluids.6.l041901
Publikováno v:
Journal of Heat Transfer. 143
The mixed convection in a thin liquid film flow over a horizontal plate is investigated under finite Prandtl numbers. The gas–liquid interface is considered free, nondeformable and subject to surface tension gradients and convection, while gravity
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e51e7987f32c4382164646c84c8d7dbb
https://doi.org/10.1115/1.4050312
https://doi.org/10.1115/1.4050312
Autor:
Ricardo D. Santos, Anton Burtsev, Vassilios Theofilis, Leonardo S. de B. Alves, Helio Quintanilha
Publikováno v:
AIAA Scitech 2021 Forum.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::d3838c4b21dfff5957000f0364ee9182
https://doi.org/10.2514/6.2021-0050
https://doi.org/10.2514/6.2021-0050
Publikováno v:
Journal of the Brazilian Society of Mechanical Sciences and Engineering. 42
Most spatial discretizations applied by finite difference and volume methods to advective/convective terms introduce significant diffusive and dispersive numerical errors, where the former is often required to improve the numerical stability to the r
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::544f15d0edfefb323663112da4759d8a
https://doi.org/10.1007/s40430-020-02346-x
https://doi.org/10.1007/s40430-020-02346-x