Results 21 to 30 of about 3,216 (210)

RANS turbulence treatment for continuous adjoint optimization [PDF]

Proceeding of THMT-15. Proceedings of the Eighth International Symposium On Turbulence Heat and Mass Transfer, 2015
This paper discusses the implementational aspects related to the turbulence modelling for continuous adjoint optimization. The starting point is the derivation of equations of the high-Reynolds number k- model of turbulence in the framework of continuous adjoint optimization.
Mirza Popovac, H. Jasak, H. Rusche, C. Reichl   +3 more
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A CONTINUOUS ADJOINT APPROACH FOR VEHICLE INTERIOR NOISE REDUCTION [PDF]

Proceedings of the VII European Congress on Computational Methods in Applied Sciences and Engineering (ECCOMAS Congress 2016), 2016
In this paper the continuous adjoint method is developed for a vibroacoustic model that predicts the interior noise of a vehicle induced by the airflow. The model simulates the front side window vibration, excited by the acoustic and hydrodynamic pressure load, and the resulting sound wave propagation into the cabin. Targeting interior noise reduction,
Kapellos, Christos, Hartmann, Michael
openaire   +1 more source

Multi-Fidelity Gradient-Based Strategy for Robust Optimization in Computational Fluid Dynamics

Algorithms, 2020
Efficient Robust Design Optimization (RDO) strategies coupling a parsimonious uncertainty quantification (UQ) method with a surrogate-based multi-objective genetic algorithm (SMOGA) are investigated for a test problem in computational fluid dynamics (CFD)
Aldo Serafino, Benoit Obert, Paola Cinnella   +2 more
doaj   +1 more source

On the Absolutely Continuous Spectrum of Self-Adjoint Extensions

Journal of Functional Analysis, 1995
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Brasche, Johannes F., Neidhardt, Hagen
openaire   +3 more sources

Continuous Adjoint Approach for the Spalart-Allmaras Model in Aerodynamic Optimization [PDF]

AIAA Journal, 2011
In this paper, the continuous adjoint method to compute shape sensitivities in aerodynamic design with turbulence modeling is described and developed. The focus is on compressible flows described by the Reynolds-averaged Navier-Stokes equations and the classical Spalart-Allmaras model for turbulence. Turbulence modeling usually requires, in particular,
Bueno-Orovio, A., Castro, C., Palacios, F., Zuazua, E.   +3 more
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A boundary value problem with a discontinuous coefficient and containing a spectral parameter in the boundary condition

International Journal of Mathematics and Mathematical Sciences, 1995
A singular non-self-adjoint boundary value problem is considered. This problem has a discontinuous coefficient with a spectral parameter in the boundary condition. Some solutions of the eigenvalue equation are given.
A. A. Darwish
doaj   +1 more source

Constraints Optimal Control Governing by Triple Nonlinear Hyperbolic Boundary Value Problem

Journal of Applied Mathematics, 2020
The focus of this work lies on proving the existence theorem of a unique state vector solution (Stvs) of the triple nonlinear hyperbolic boundary value problem (TNHBVP) when the classical continuous control vector (CCCVE) is fixed by using the Galerkin ...
Jamil A. Ali Al-Hawasy, Lamyaa H. Ali
doaj   +1 more source

Shape Optimization of a Two-Fluid Mixing Device Using Continuous Adjoint

Fluids, 2020
In this paper, the continuous adjoint method is used for the optimization of a static mixing device. The CFD model used is suitable for the flow simulation of the two miscible fluids that enter the device.
Pavlos Alexias, Kyriakos C. Giannakoglou   +1 more
doaj   +1 more source

A continuous adjoint for photo-acoustic tomography of the brain [PDF]

Inverse Problems, 2018
Abstract We present an optimisation framework for photo-acoustic tomography of the brain based on a system of coupled equations that describe the propagation of sound waves in linear isotropic inhomogeneous and lossy elastic media with absorption and physical dispersion following a frequency power law using ...
Ashkan Javaherian, Sean Holman
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Continuation Semantics and Self-adjointness

Electronic Notes in Theoretical Computer Science, 1997
AbstractWe give an abstract categorical presentation of continuation semantics by taking the continuation type constructor ¬ (or cont in Standard ML of New Jersey) as primitive. This constructor on types extends to a contravariant functor on terms which is adjoint to itself on the left; restricted to the subcategory of those programs that do not ...
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