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Listar por palabra clave "Boundary conditions"

Mostrando ítems 1-11 de 11

A large-eddy simulation of diesel-like gas jets

Hoyas, S; Gil, A.; Mompó Laborda, Juan Manuel; Khuong ., Anh Dung (Inderscience, 2011)

[EN] Some aspects of the transient evolution of diesel-like gas jets by means of large-eddy simulation (LES) are discussed in this work. In order to understand the relationship between the inlet boundary condition and the ...
Assessment of a methodology to mesh the spatial domain in the proximity of the boundary conditions for one-dimensional gas dynamic calculation

J.R. Serrano; Arnau Martínez, Francisco José; Piqueras, P.; Reyes Belmonte, Miguel Ángel (Elsevier, 2011)

[EN] Solution of governing equations for one-dimensional compressible unsteady flow has been performed traditionally using a homogenously distributed spatial mesh. In the resulting node structure, the internal nodes are ...
Creation of a magnetic boundary condition in a radiating ground plane to excite antenna modes

Sonkki, Marko; Cabedo Fabrés, Marta; Antonino Daviu, Eva; Ferrando Bataller, Miguel; Salonen, Erkki T. (Institute of Electrical and Electronics Engineers (IEEE), 2011-10)

The creation of a magnetic boundary condition into the plane of symmetry in a radiating ground plane of a portable device is proposed to enhance its radiation efficiency and bandwidth. This magnetic boundary condition is ...
Engine combustion network (ECN): characterization and comparison of boundary conditions for different combustion vessels

Meijer, Maarten; Somers, Bart; Johnson, Jaclyn; Naber, Jeffrey; Lee, Seong-Young; Malbec, Louis Marie; Bruneaux, Gilles; Pickett, Lyle M.; Bardi, Michele; Payri Marín, Raúl; Bazyn, Tim (Begell House, 2012)

The Engine Combustion Network (ECN) is a worldwide group of institutions using combustion vessels and/or performing computational fluid dynamics (CFD) simulation, whose aim is to advance the state of spray and combustion ...
Improved computation of propagation losses in waveguide structures using perturbation of boundary conditions

Marini, Stephan; Mattes, Michael; Gimeno Martinez, Benito; Boria Esbert, Vicente Enrique (Institute of Electrical and Electronics Engineers (IEEE), 2011-11)

In this letter, a method for the improved consideration of propagation losses in metallic waveguide structures is presented. The method relies on the perturbation of the boundary conditions on the metallic walls of the ...
Influence of the thermal boundary condition on the heat transfer in a rib-roughened cooling channel using LES and RANS

Torres García, José Vicente (Universitat Politècnica de València, 2015-04-27)

Internal cooling systems equipped with rib-roughened cooling ducts are used at turbine blades to refrigerate the metal by forced convection. The heat exchange between the walls of the cooling duct and the uid is sometimes ...
Investigación experimental del mecanismo de excitación de una onda pesada giratoria

Siles Campos, María Teresa (Universitat Politècnica de València, 2020-05-21)

[ES] Aunque este experimento ya se había estudiado de antemano, se encontraron algunas irregularidades, por lo que en este nuevo estudio se han resuelto algunas de ellas, y también en condiciones más realistas, ya que el ...
Lambda modes comparison for different approximations of the neutron transport equation: Diffusion, SN and SP3

Morató-Rafet, Sergio; Kochunas, B.; Miró Herrero, Rafael; Verdú Martín, Gumersindo Jesús; Larsen, E. W.; Downar, T. (Elsevier, 2021-05)

[EN] The methods presented in this paper solve the Simplified Spherical Harmonics approximation to the mul- tidimensional neutron transport equation. 1D, 2D and 3D systems were modeled with Cartesian geome- try using the ...
New efficient numerical methods to describe the heat transfer in a solid medium

Ponsoda Miralles, Enrique; Blanes Zamora, Sergio; Bader, Philipp (Elsevier, 2011-10)

The analysis of heat conduction through a solid with heat generation leads to a linear matrix differential equation with separated boundary conditions. We present a symmetric second order exponential integrator for the ...
Time-averaging and exponential integrators for non-homogeneous linear IVPs and BVPs

Blanes Zamora, Sergio; Ponsoda Miralles, Enrique (Elsevier, 2012-08)

We consider time-averaging methods based on the Magnus series expansion jointly with exponential integrators for the numerical integration of general linear non-homogeneous differential equations. The schemes can be ...
Transmission, reflection and absorption in Sonic and Phononic Crystals

Cebrecos Ruiz, Alejandro (Universitat Politècnica de València, 2015-10-26)

[EN] Phononic crystals are artificial materials formed by a periodic arrangement of inclusions embedded into a host medium, where each of them can be solid or fluid. By controlling the geometry and the impedance contrast ...