The Experts below are selected from a list of 318 Experts worldwide ranked by ideXlab platform

Liyun Wang - One of the best experts on this subject based on the ideXlab platform.

  • Solute Transport in the Bone Lacunar-Canalicular System (LCS)
    Current Osteoporosis Reports, 2018
    Co-Authors: Liyun Wang
    Abstract:

    Purpose of Review Solute Transport in the lacunar-canalicular system (LCS) plays important roles in osteocyte metabolism and cell-cell signaling. This review will summarize recent studies that establish pericellular matrix (PCM), discovered inside the LCS, as a crucial regulator of Solute Transport in bone. Recent Findings Utilizing confocal imaging and mathematical modeling, recent studies successfully quantified molecular diffusion and convection in the LCS as well as the size-dependent sieving effects of the PCM, leading to the quantification of the effective PCM fiber spacing (10 to 17 nm) in murine adult bones. Perlecan/HSPG2, a large linear proteoglycan, was identified to be an essential PCM component. Summary The PCM-filled LCS is bone’s chromatographic column, where fluid/Solute Transport to and from the osteocytes is regulated. The chemical composition, deposition rate, and turnover rate of the osteocyte PCM should be further defined to better understand osteocyte physiology and bone metabolism.

  • Solute Transport in the Bone Lacunar-Canalicular System (LCS)
    Current osteoporosis reports, 2018
    Co-Authors: Liyun Wang
    Abstract:

    Purpose of Review Solute Transport in the lacunar-canalicular system (LCS) plays important roles in osteocyte metabolism and cell-cell signaling. This review will summarize recent studies that establish pericellular matrix (PCM), discovered inside the LCS, as a crucial regulator of Solute Transport in bone.

Hana Hlaváčiková - One of the best experts on this subject based on the ideXlab platform.

  • Modelling of Water Flow and Solute Transport in Soil
    Applied Soil Hydrology, 2018
    Co-Authors: Viliam Novák, Hana Hlaváčiková
    Abstract:

    The chapter presents the basic state of the art of water flow and Solute Transport modelling in unsaturated zone of soil. It provides a brief overview of model development and categorisation according to various criteria. The governing equations of water flow and Solute Transport, the time and space discretization of the computing domain, the initial and boundary conditions, the necessary input data and model outputs are presented. The chapter includes a short description of the most popular models of water and energy Transport in variably saturated porous media. The challenges regarding the modelling of water flow, Solute Transport and marginally of other soil processes in the soil, along with references, are also mentioned.

M Wang - One of the best experts on this subject based on the ideXlab platform.

  • transient Solute Transport with sorption in poiseuille flow
    arXiv: Fluid Dynamics, 2019
    Co-Authors: Li Zhang, Marc A Hesse, M Wang
    Abstract:

    Previous work on Solute Transport with sorption in Poiseuille flow has reached contradictory conclusions. Some have concluded that sorption increases mean Solute Transport velocity and decreases dispersion relative to a tracer, while others have concluded the opposite. Here we resolve this contradiction by deriving a series solution for the transient evolution that recovers previous results in the appropriate limits. This solution shows a transition in Solute Transport behavior from early to late time that is captured by the first- and zeroth-order terms. Mean Solute Transport velocity is increased at early times and reduced at late times, while Solute dispersion is initially reduced, but shows a complex dependence on the partition coefficient $k$ at late times. In the equilibrium sorption model, the time scale of the early regime and the duration of the transition to the late regime both increase with $\text{ln} k$ for large $k$. The early regime is pronounced in strongly-sorbing systems ($k\gg 1$). The kinetic sorption model shows a similar transition from the early to the late Transport regime and recovers the equilibrium results when adsorption and desorption rates are large. As the reaction rates slow down, the duration of the early regime increases, but the changes in Transport velocity and dispersion relative to a tracer diminish. In general, if the partition coefficient $k$ is large, the early regime is well-developed and the behavior is well characterized by the analysis of the limiting case without desorption.

  • transient Solute Transport with sorption in poiseuille flow
    Journal of Fluid Mechanics, 2017
    Co-Authors: Li Zhang, Marc A Hesse, M Wang
    Abstract:

    Previous work on Solute Transport with sorption in Poiseuille flow has reached contradictory conclusions. Some have concluded that sorption increases mean Solute Transport velocity and decreases dispersion relative to a tracer, while others have concluded the opposite. Here we resolve this contradiction by deriving a series solution for the transient evolution that recovers previous results in the appropriate limits. This solution shows a transition in Solute Transport behaviour from early to late time that is captured by the first- and zeroth-order terms. Mean Solute Transport velocity is increased at early times and reduced at late times, while Solute dispersion is initially reduced, but shows a complex dependence on the partition coefficient at late times. In the equilibrium sorption model, the time scale of the early regime and the duration of the transition to the late regime both increase with for large . The early regime is pronounced in strongly sorbing systems ( ). The kinetic sorption model shows a similar transition from the early to the late Transport regime and recovers the equilibrium results when adsorption and desorption rates are large. As the reaction rates slow down, the duration of the early regime increases, but the changes in Transport velocity and dispersion relative to a tracer diminish. In general, if the partition coefficient is large, the early regime is well developed and the behaviour is well characterized by the analysis of the limiting case without desorption.

Viliam Novák - One of the best experts on this subject based on the ideXlab platform.

  • Modelling of Water Flow and Solute Transport in Soil
    Applied Soil Hydrology, 2018
    Co-Authors: Viliam Novák, Hana Hlaváčiková
    Abstract:

    The chapter presents the basic state of the art of water flow and Solute Transport modelling in unsaturated zone of soil. It provides a brief overview of model development and categorisation according to various criteria. The governing equations of water flow and Solute Transport, the time and space discretization of the computing domain, the initial and boundary conditions, the necessary input data and model outputs are presented. The chapter includes a short description of the most popular models of water and energy Transport in variably saturated porous media. The challenges regarding the modelling of water flow, Solute Transport and marginally of other soil processes in the soil, along with references, are also mentioned.

J. C. Santamarina - One of the best experts on this subject based on the ideXlab platform.

  • Solute Transport during cyclic flow in saturated porous media
    Applied Physics Letters, 2004
    Co-Authors: Guillermo H. Goldsztein, J. C. Santamarina
    Abstract:

    We consider materials with large pores interconnected by thin long channels saturated with an incompressible fluid. In the absence of fluid flow, Solute Transport in the porous network is diffusion controlled, however, Solute Transport can be enhanced when the porous network is subjected to a cyclic flow with zero time average velocity. We develop a mathematical model to analyze this physical phenomenon and obtain an effective macroscale diffusion coefficient for Solute Transport which dependends on cyclic flow conditions and the geometry of the porous network.