Results 51 to 60 of about 63,527 (207)
, 2007 A unified description of the free-space cylindrical vector beams is presented, which is an integral transformation solution to the vector Helmholtz equation and the transversality condition.
Ashkin +20 more
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Journal of Low Frequency Noise, Vibration and Active Control, 2022 As an applicable noise attenuator, Helmholtz resonator is mainly used to dampen acoustic noise at low- and medium-frequency ranges. It is typically implemented in combustion-engines and gas turbines to dampen thermoacoustic instabilities. However, it has
Weiwei Wu, Yiheng Guan
doaj +1 more source
Weakly nonlinear thermoacoustics for stacks with slowly varying pore cross-sections [PDF]
A general theory of thermoacoustics is derived for arbitrary stack pores. Previous theoretical treatments of porous media are extended by considering arbitrarily shaped pores with the only restriction that the pore cross-sections vary slowly in the ...
Molenaar, J. +3 more
core +2 more sources
The complex Jacobi iterative method for non-paraxial beam propagation in nonlinear optical waveguides [PDF]
, 2009 The recently introduced beam propagation method using complex Jacobi iteration adapted for modeling of non-paraxial beam propagation in nonlinear optical waveguides is presented in this paper.
Bienstman, Peter, Le Quang, Khai
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JTAM (Jurnal Teori dan Aplikasi Matematika)In this paper, steady infiltration problems into a homogeneous soil from a single triangular and trapezoidal irrigation channel are considered. The governing equation is Richard's equation that represents the movement of water in unsaturated soil.
Munadi Munadi +4 more
doaj +1 more source
A simplified two-dimensional boundary element method with arbitrary uniform mean flow
Theoretical and Applied Mechanics Letters, 2017 To reduce computational costs, an improved form of the frequency domain boundary element method (BEM) is proposed for two-dimensional radiation and propagation acoustic problems in a subsonic uniform flow with arbitrary orientation. The boundary integral
Bassem Barhoumi +2 more
doaj +1 more source
Scalar-tensor cosmological simulations
, 2008 We present $N$-body cosmlogical simulations in the framework of the Newtonian limit of scalar-tensor theories of gravity. The scalar field is described by a modified Helmholtz equation with a source that is coupled to the standard Poisson equation of ...
Abel Camacho +3 more
core +1 more source
Localization, Stability, and Resolution of Topological Derivative Based Imaging Functionals in Elasticity [PDF]
, 2012 The focus of this work is on rigorous mathematical analysis of the topological derivative based detection algorithms for the localization of an elastic inclusion of vanishing characteristic size.
Ammari, Habib +5 more
core +4 more sources
Solutions of the Schrödinger equation and thermodynamic properties of a combined potential
Heliyon, 2021 The solution of the radial Schrödinger equation was obtained using the methodology of supersymmetric approach with a combination of modified generalized Pöschl-Teller potential and inversely quadratic Yukawa potential model.
C.A. Onate, M.C. Onyeaju
doaj +1 more source
Some remarks on a modified Helmholtz equation with inhomogeneous source
Applied Mathematical Modelling, 2013 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Nguyen, Huy Tuan +2 more
openaire +1 more source