Zobrazeno 1 - 10
of 1 071
pro vyhledávání: '"Helmig, P."'
We develop $H$(div)-conforming mixed finite element methods for the unsteady Stokes equations modeling single-phase incompressible fluid flow. A projection method in the framework of the incremental pressure correction methodology is applied, where a
Externí odkaz:
http://arxiv.org/abs/2410.14266
Vertical equilibrium models have proven to be well suited for simulating fluid flow in subsurface porous media such as saline aquifers with caprocks. However, in most cases the dimensionally reduced model lacks the accuracy to capture the dynamics of
Externí odkaz:
http://arxiv.org/abs/2405.18285
A discretization method with non-matching grids is proposed for the coupled Stokes-Darcy problem that uses a mortar variable at the interface to couple the marker and cell (MAC) method in the Stokes domain with the Raviart-Thomas mixed finite element
Externí odkaz:
http://arxiv.org/abs/2402.10615
This work presents a data-driven framework for multi-scale parametrization of velocity-dependent dispersive transport in porous media. Pore-scale flow and transport simulations are conducted on periodic pore geometries, and volume-averaging is used t
Externí odkaz:
http://arxiv.org/abs/2311.13975
A new numerical mesoscopic scale one-domain approach solver for free fluid/porous medium interaction
A new numerical continuum \textit{one-domain} approach (ODA) solver is presented for the simulation of the transfer processes between a free fluid and a porous medium. The solver is developed in the \textit{mesoscopic} scale framework, where a contin
Externí odkaz:
http://arxiv.org/abs/2309.03543
Autor:
M. J. Rowlinson, M. J. Evans, L. J. Carpenter, K. A. Read, S. Punjabi, A. Adedeji, L. Fakes, A. Lewis, B. Richmond, N. Passant, T. Murrells, B. Henderson, K. H. Bates, D. Helmig
Publikováno v:
Atmospheric Chemistry and Physics, Vol 24, Pp 8317-8342 (2024)
Non-methane volatile organic compounds (NMVOCs) generate ozone (O3) when they are oxidised in the presence of oxides of nitrogen, modulate the oxidative capacity of the atmosphere and can lead to the formation of aerosol. Here, we assess the capabili
Externí odkaz:
https://doaj.org/article/614b456fc31f4dc6b69a2bb466df0c01
Presented in this work is a framework for the data-driven determination of multi-scale porous media parametrizations. Simulations of flow and transport in a porous medium at the REV scale, although efficient, require well defined parameters that repr
Externí odkaz:
http://arxiv.org/abs/2302.14512
The flux-mortar mixed finite element method was recently developed for a general class of domain decomposition saddle point problems on non-matching grids. In this work we develop the method for Darcy flow using the multipoint flux approximation as t
Externí odkaz:
http://arxiv.org/abs/2211.16897
Fluid flow through layered materials with different wetting behavior is observed in a wide range of applications in biological, environmental and technical systems. Therefore, it is necessary to understand the occuring transport mechanisms of the flu
Externí odkaz:
http://arxiv.org/abs/2201.13131
Autor:
Michalkowski, Cynthia, Veyskarami, Maziar, Bringedal, Carina, Helmig, Rainer, Schleper, Veronika
For improved operating conditions of a polymer electrolyte membrane (PEM) fuel cell, a sophisticated water management is crucial. Therefore, it is necessary to understand the transport mechanisms of water throughout the cell constituents especially o
Externí odkaz:
http://arxiv.org/abs/2201.12063