115 citations · 215 across the 16 of their papers we have counts for
16 papers
Three-Dimensional Freeform Reflector Design with a Microfacet Surface Roughness Model
Vì Kronberg, Martijn Anthonissen, Jan ten Thije Boonkkamp +1
This manuscript will unify inverse freeform reflector design and surface light scattering to design freeform reflectors with a scattering surface. We use microfacets, which are sma…
Concatenated Backward Ray Mapping on the Compound Parabolic Concentrator
Willem Jansen, Martijn Anthonissen, Jan ten Thije Boonkkamp +1
Concatenated backward ray mapping is an alternative for ray tracing in 2D. It is based on the phase-space description of an optical system. Phase space is the set of position and d…
Design of two-dimensional reflective imaging systems: An approach based on inverse methods
Sanjana Verma, Martijn J. H. Anthonissen, Jan H. M. ten Thije Boonkkamp +1
Imaging systems are inherently prone to aberrations. We present an optimization method to design two-dimensional freeform reflectors that minimize aberrations for various parallel…
Three-Dimensional Freeform Reflector Design with a Scattering Surface
Vì Kronberg, Martijn Anthonissen, Jan ten Thije Boonkkamp +1
We introduce a novel approach to calculating three-dimensional freeform reflectors with a scattering surface. Our method is based on optimal transport and utilizes a Fredholm integ…
An Iterative Least-Squares Method for the Hyperbolic Monge-Ampère Equation with Transport Boundary Condition
Maikel W. M. C. Bertens, Martijn J. H. Anthonissen, Jan H. M. ten Thije Boonkkamp +1
A least-squares method for solving the hyperbolic Monge-Ampère equation with transport boundary condition is introduced. The method relies on an iterative procedure for the gradien…
Computing aberration coefficients for plane-symmetric reflective systems: A Lie algebraic approach
A. Barion, M. J. H. Anthonissen, J. H. M. ten Thije Boonkkamp +1
We apply the Lie algebraic method to reflecting optical systems with plane-symmetric freeform mirrors. Using analytical ray-tracing equations we construct an optical map. The expan…
Two-Dimensional Freeform Reflector Design with a Scattering Surface
Vì Kronberg, Martijn Anthonissen, Jan ten Thije Boonkkamp +1
We combine two-dimensional freeform reflector design with a scattering surface modelled using microfacets, i.e., small specular surfaces representing surface roughness. The model r…
Alternative computation of the Seidel aberration coefficients using the Lie algebraic method
A. Barion, M. J. H. Anthonissen, J. H. M. ten Thije Boonkkamp +1
We give a brief introduction to Hamiltonian optics and Lie algebraic methods. We use these methods to describe the operators governing light propagation, refraction and reflection…
Complete flux scheme for variable velocity fields: coupling between the advection-diffusion equation and the Poisson equation for the velocity field
Hanz Martin Cheng, Jan ten Thije Boonkkamp
In this work, we consider an advection-diffusion equation, coupled to a Poisson equation for the velocity field. This type of coupling is typically encountered in models arising fr…
Combining the hybrid mimetic mixed method with the Scharfetter-Gummel scheme for magnetised transport in plasmas
Hanz Martin Cheng, Jan ten thije Boonkkamp, Jesper Janssen +2
In this paper, we propose a numerical scheme for fluid models of magnetised plasmas. One important feature of the numerical scheme is that it should be able to handle the anisotrop…
Complete Flux Scheme for Elliptic Singularly Perturbed Differential-Difference Equations
Sunil Kumar, B. V. Rathish Kumar, J. H. M. Ten Thije Boonkkamp
In this study, we propose a new scheme named as complete flux scheme (CFS) based on the finite volume method for solving singularly perturbed differential-difference equations (SPD…
Full linear multistep methods as root-finders
Bart S. van Lith, Jan H. M. ten Thije Boonkkamp, Wilbert L. IJzerman
Root-finders based on full linear multistep methods (LMMs) use previous function values, derivatives and root estimates to iteratively find a root of a nonlinear function. As ODE s…
Embedded WENO: a design strategy to improve existing WENO schemes
Bart S. van Lith, Jan H. M. ten Thije Boonkkamp, Wilbert L. IJzerman
Embedded WENO methods utilize all adjacent smooth substencils to construct a desirable interpolation. Conventional WENO schemes under-use this possibility close to large gradients…
Axisymmetric multiphase lattice Boltzmann method
Sudhir Srivastava, Prasad Perlekar, Jan H. M. ten Thije Boonkkamp +2
A lattice Boltzmann method for axisymmetric multiphase flows is presented and validated. The method is capable of accurately modeling flows with variable density. We develop the cl…
Analytical modeling for the heat transfer in sheared flows of nanofluids
Claudio Ferrari, Badr Kaoui, Victor S. L'vov +4
We developed a model for the enhancement of the heat flux by spherical and elongated nano- particles in sheared laminar flows of nano-fluids. Besides the heat flux carried by the n…
An efficient, second order method for the approximation of the Basset history force
M. A. T. van Hinsberg, J. H. M. ten Thije Boonkkamp, H. J. H. Clercx
The hydrodynamic forces exerted by a fluid on small isolated rigid spherical particles are usually well described by the Maxey-Riley (MR) equation. The most time-consuming contribu…