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Geevers, S. (author), Mulder, W.A. (author), van der Vegt, J (author)
We present a new accuracy condition for constructing mass-lumped elements. This condition is less restrictive than the one previously used and enabled us to construct new mass-lumped tetrahedral elements for 3D wave propagation modelling. The new degree-2 and degree-3 elements require significantly fewer nodes than previous versions and mass...
abstract 2019
document
Cupillard, Paul (author), Mulder, W.A. (author), Irakarama, Modeste (author), Mazuyer, Antoine (author), Anquez, Pierre (author)
Within the last decade, non-periodic homogenization proved to be an accurate upscaling method for computing smooth equivalent media of elastic models of the earth interior. Doing so, it reveals the seismic anisotropy induced by small-scale structures and it eases the numerical simulation of wave propagation in complex geological settings by...
abstract 2019
document
van Leeuwen, T.D. (author), Cleij, D. (author), Pool, D.M. (author), Mulder, M. (author), Bülthoff, Heinrich H. (author)
abstract 2017
document
van der El, K. (author), Pool, D.M. (author), Mulder, M. (author)
abstract 2017
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Mulder, G. (author), van Leijen, F.J. (author), Barkmeijer, Jan (author), de Haan, Siebren (author), Hanssen, R.F. (author)
The influence of signal delay due to the varying atmospheric refractivity can be significant in individual interferograms. This signal is generally considered to be noise in deformation studies, but it can also potentially be used to improve weather models [1]. This application has an enormous potential, because, contrary to deformation studies,...
abstract 2017
document
Mulder, G. (author), van Leijen, F.J. (author), Barkmeijer, Jan (author), de Haan, Siebren (author), Hanssen, R.F. (author)
InSAR signal delays due to the varying atmospheric refractivity are a potential data source to improve weathermodels [1]. Especially with the launch of the new Sentinel-1 satellites, which increases data coverage, latency andaccessibility, it may become possible to operationalize the assimilation of differential integrated refractivity (DIR...
abstract 2017
document
Levelt, D.F. (author), Mulder, G. (author), van Leijen, F.J. (author), Hanssen, R.F. (author)
abstract 2017
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Geevers, Sjoerd (author), van der Vegt, Jaap (author), Mulder, W.A. (author)
We present and analyse a Symmetric Interior Penalty Discontinuous Galerkin (SIPDG) method combined with an explicit hybrid Local Time Stepping (LTS) scheme for solving seismic wave problems in heterogeneous anisotropic elastic media. The discontinuous Galerkin method allows for local adjustment of the mesh size and approximation order, and can...
abstract 2016
document
Grobbe, N. (author), Maas, P. (author), Slob, E.C. (author), Mulder, W.A. (author)
abstract 2015
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