TY - JOUR
T1 - A model for non-isothermal flow and mineral precipitation and dissolution in a thin strip
AU - Bringedal, C.
AU - Berre, I.
AU - Pop, I.S.
AU - Radu, F.A.
PY - 2015
Y1 - 2015
N2 - Sixth International Conference on Advanced Computational Methods in Engineering (ACOMEN 2014)
Motivated by porosity changes due to chemical reactions caused by injection of cold water in a geothermal reservoir, we propose a two-dimensional pore scale model of a thin strip. The pore scale model includes fluid flow, heat transport and reactive transport where changes in aperture is taken into account. The thin strip consists of void space and grains, where ions are transported in the fluid in the void space. At the interface between void and grain, ions are allowed to precipitate and become part of the grain, or conversely, minerals in the grain can dissolve and become part of the fluid flow, and we honor the possible change in aperture these two processes cause. We include temperature dependence and possible effects of the temperature in both fluid properties and in the mineral precipitation and dissolution reactions. For the pore scale model equations, we investigate the limit as the width of the thin strip approaches zero, deriving upscaled one-dimensional effective equations.
Keywords: Geothermal energy; Homogenization; Mineral precipitation/dissolution; Porosity changes; Reactive transport; Free boundary
AB - Sixth International Conference on Advanced Computational Methods in Engineering (ACOMEN 2014)
Motivated by porosity changes due to chemical reactions caused by injection of cold water in a geothermal reservoir, we propose a two-dimensional pore scale model of a thin strip. The pore scale model includes fluid flow, heat transport and reactive transport where changes in aperture is taken into account. The thin strip consists of void space and grains, where ions are transported in the fluid in the void space. At the interface between void and grain, ions are allowed to precipitate and become part of the grain, or conversely, minerals in the grain can dissolve and become part of the fluid flow, and we honor the possible change in aperture these two processes cause. We include temperature dependence and possible effects of the temperature in both fluid properties and in the mineral precipitation and dissolution reactions. For the pore scale model equations, we investigate the limit as the width of the thin strip approaches zero, deriving upscaled one-dimensional effective equations.
Keywords: Geothermal energy; Homogenization; Mineral precipitation/dissolution; Porosity changes; Reactive transport; Free boundary
U2 - 10.1016/j.cam.2014.12.009
DO - 10.1016/j.cam.2014.12.009
M3 - Article
SN - 0377-0427
VL - 289
SP - 346
EP - 355
JO - Journal of Computational and Applied Mathematics
JF - Journal of Computational and Applied Mathematics
ER -