Pore-Scale Controls on Calcite Dissolution Rates from Flow-through Laboratory and Numerical Experiments

2014 ◽  
Vol 48 (13) ◽  
pp. 7453-7460 ◽  
Author(s):  
Sergi Molins ◽  
David Trebotich ◽  
Li Yang ◽  
Jonathan B. Ajo-Franklin ◽  
Terry J. Ligocki ◽  
...  
Keyword(s):  
Numerical Experiments ◽  
Pore Scale ◽  
Dissolution Rates ◽  
Calcite Dissolution ◽  
Flow Through

Pore-Scale Modeling of Non-Newtonian Fluid Flow Through Micro-CT Images of Rocks

2018 ◽  
pp. 363-375
Author(s):  
Moussa Tembely ◽  
Ali M. AlSumaiti ◽  
Khurshed Rahimov ◽  
Mohamed S. Jouini
Keyword(s):  
Fluid Flow ◽  
Newtonian Fluid ◽  
Ct Images ◽  
Micro Ct ◽  
Pore Scale ◽  
Scale Modeling ◽  
Pore Scale Modeling ◽  
Flow Through

Pore-scale numerical study of intrinsic permeability for fluid flow through asymmetric ceramic microfiltration membranes

2022 ◽  
Vol 642 ◽  
pp. 119920
Author(s):  
Shuang Song ◽  
Liangwan Rong ◽  
Kejun Dong ◽  
Xuefei Liu ◽  
Pierre Le-Clech ◽  
...  
Keyword(s):  
Fluid Flow ◽  
Numerical Study ◽  
Pore Scale ◽  
Intrinsic Permeability ◽  
Microfiltration Membranes ◽  
Flow Through

Rotating flow past disks and cylindrical depressions

1984 ◽  
Vol 141 ◽  
pp. 67-95 ◽  
Author(s):  
Don L. Boyer ◽  
Peter A. Davies ◽  
William R. Holland
Keyword(s):  
Numerical Experiments ◽  
Numerical Solutions ◽  
Water Channel ◽  
Three Dimensional ◽  
Topographic Features ◽  
Lower Bounding ◽  
Beta Plane ◽  
Beta Effect ◽  
Flow Through ◽  
Bounding Surfaces

The flow of a rotating fluid over isolated three-dimensional topographic features has been investigated. Laboratory experiments have been conducted with a rotating water channel to determine the characteristics of the flow over and around truncated cylindrical disks and depressions located on the upper and lower bounding surfaces of the channel. The geometry of the rotating channel allowed the beta effect to be modelled and cases of beta-plane westward, beta-plane eastward and f-plane flows were studied. Flow patterns revealed by the use of an electrolytic precipitation technique are presented, and the flow behaviour is quantified in terms of a characteristic speed of the flow through a circular cylinder circumscribing the topography in the vicinity of the channel midplane. Case studies are presented for a range of values of Rossby number, Ekman number, beta parameter, and cylinder height-to-radius ratio. The vorticity equation and associated boundary conditions are discussed for the cases studied in the laboratory and appropriate numerical solutions are obtained. The laboratory and numerical experiments demonstrate the character of the horizontal steering of fluid by the topographic features as a function of the system parameters. Comparisons between laboratory and numerical experiments are presented and shown to be in good agreement.

Fluid Flow Structures in Staggered Banks of Cylinders Located in a Channel

1995 ◽  
Vol 117 (1) ◽  
pp. 36-44 ◽  
Author(s):  
M. J. Braun ◽  
V. V. Kudriavtsev
Keyword(s):  
Fluid Flow ◽  
Numerical Experiments ◽  
Reynolds Numbers ◽  
Flow Structures ◽  
Wall Jet ◽  
Square Channel ◽  
Pressure Distributions ◽  
Geometric Configurations ◽  
Model Fluid ◽  
Flow Through

This paper contains numerical experiments that model fluid flow through a staggered array of cylinders and represents a continuation of work previously performed by the authors (Braun et al., 1993; Kudriavstsev et al., 1993). The results shown here concentrate on the analysis of the physics of flow and pressure distribution in (i) one row of cylinders, and (ii) seven rows of cylinders. The test section is the same square channel described by Braun et al. (1993). The numerical experiments were run in transient mode at Reynolds numbers (Re = umaxd/v) ranging from 86 to 869. The primary purpose of this paper is to report qualitative results regarding the attached near-wall jet phenomenon and to discuss its flow mechanics. The authors compare various stages of the transient evolution of the flow structures for geometric configurations that contain one, and seven rows of pins respectively. The associated pressure distributions in the arrays of pins are also discussed.

scholarly journals Cave airflow patterns control calcite dissolution rates within a cave stream: Blowing Springs Cave, Arkansas, USA

2020 ◽  
Author(s):  
Matthew Covington ◽  
Katherine Knierim ◽  
Holly Young ◽  
Josue Rodriguez ◽  
Hannah Gnoza
Keyword(s):  
Dissolution Rates ◽  
Calcite Dissolution

scholarly journals A Statistical Approach for Analysis of Dissolution Rates Including Surface Morphology

Minerals ◽  
2019 ◽  
Vol 9 (8) ◽  
pp. 458 ◽  
Author(s):  
Elisabete Trindade Pedrosa ◽  
Inna Kurganskaya ◽  
Cornelius Fischer ◽  
Andreas Luttge
Keyword(s):  
Mineral Dissolution ◽  
Etch Pits ◽  
Dissolution Rates ◽  
Calcite Dissolution ◽  
Crystal Dissolution ◽  
Vertical Scanning Interferometry ◽  
Surface Morphologies ◽  
Micrometer Scale ◽  
Flow Experiments

Understanding mineral dissolution is relevant for natural and industrial processes that involve the interaction of crystalline solids and fluids. The dissolution of slow dissolving minerals is typically surface controlled as opposed to diffusion/transport controlled. At these conditions, the dissolution rate is no longer constant in time or space, an outcome observed in rate maps and correspondent rate spectra. The contribution and statistical prevalence of different dissolution mechanisms is not known. Aiming to contribute to close this gap, we present a statistical analysis of the variability of calcite dissolution rates at the nano- to micrometer scale. A calcite-cemented sandstone was used to perform flow experiments. Dissolution of the calcite-filled rock pores was measured using vertical scanning interferometry. The resultant types of surface morphologies influenced the outcome of dissolution. We provide a statistical description of these morphologies and show their temporal evolution as an alternative to the lack of rate spatial variability in rate constants. Crystal size impacts dissolution rates most probably due to the contribution of the crystal edges. We propose a new methodology to analyze the highest rates (tales of rate spectra) that represent the formation of deeper etch pits. These results have application to the parametrization and upscaling of geochemical kinetic models, the characterization of industrial solid materials and the fundamental understanding of crystal dissolution.

scholarly journals The Complexity of Porous Media Flow Characterized in a Microfluidic Model Based on Confocal Laser Scanning Microscopy and Micro-PIV

2020 ◽  
Author(s):  
D. A. M. de Winter ◽  
K. Weishaupt ◽  
S. Scheller ◽  
S. Frey ◽  
A. Raoof ◽  
...  
Keyword(s):  
Porous Media ◽  
Fluid Flow ◽  
Confocal Laser Scanning Microscopy ◽  
Laser Scanning ◽  
Laser Scanning Microscopy ◽  
Confocal Laser Scanning ◽  
Confocal Laser ◽  
Pore Scale ◽  
Micro Piv ◽  
Flow Through

Abstract In this study, the complexity of a steady-state flow through porous media is revealed using confocal laser scanning microscopy (CLSM). Micro-particle image velocimetry (micro-PIV) is applied to construct movies of colloidal particles. The calculated velocity vector fields from images are further utilized to obtain laminar flow streamlines. Fluid flow through a single straight channel is used to confirm that quantitative CLSM measurements can be conducted. Next, the coupling between the flow in a channel and the movement within an intersecting dead-end region is studied. Quantitative CLSM measurements confirm the numerically determined coupling parameter from earlier work of the authors. The fluid flow complexity is demonstrated using a porous medium consisting of a regular grid of pores in contact with a flowing fluid channel. The porous media structure was further used as the simulation domain for numerical modeling. Both the simulation, based on solving Stokes equations, and the experimental data show presence of non-trivial streamline trajectories across the pore structures. In view of the results, we argue that the hydrodynamic mixing is a combination of non-trivial streamline routing and Brownian motion by pore-scale diffusion. The results provide insight into challenges in upscaling hydrodynamic dispersion from pore scale to representative elementary volume (REV) scale. Furthermore, the successful quantitative validation of CLSM-based data from a microfluidic model fed by an electrical syringe pump provided a valuable benchmark for qualitative validation of computer simulation results. Graphic Abstract

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