Centrifuge Modeling of Transport Processes for Pollutants in Soils

Centrifuge modeling of one-step outflow tests for unsaturated parameter estimations

“…The scaling relationship of the centrifuge model at Ng, where the same soil and pore fluid are used in both the model and its prototype, is shown in Table 1 (Arulanandan et al, 1988). While this relationship is self-evident or well-established for saturated flow conditions, more careful attention needs to be paid to unsaturated conditions where the capillary force could be much larger than the body force.…”

“…Since Arulanandan et al (1988) analyzed scaling similitude of centrifuge modeling for flow and transport problems, the applications of centrifuge modeling techniques have been extended to various problems, including miscible contaminant transport in saturated and multi-phase flow problems (e.g., Hensley and Schofield, 1991;Nakajima et al, 1998Nakajima et al, , 2005Oung et al, 2005). While these works proved the usefulness of centrifuge modeling, they have also shown that centrifuge scaling similitude is not always conserved (e.g., Arulanandan et al, 1988;Goforth, 1991;Cooke and Mitchell, 1991;Culligan and Barry, 1998).…”

“…While these works proved the usefulness of centrifuge modeling, they have also shown that centrifuge scaling similitude is not always conserved (e.g., Arulanandan et al, 1988;Goforth, 1991;Cooke and Mitchell, 1991;Culligan and Barry, 1998). Culligan and Barry (1998) used experimental results to analyze the scaling laws for multiphase flow in centrifuge models.…”

Measuring Hydraulic Conductivity Using Geotechnical Centrifuge

“…This method was chosen because of its ability to model complex natural systems in a controlled laboratory environment (Wan Zuhairi and Muchlis, 2012). By using a centrifugation, Darcy's velocity in a Centrifuge model was tested at N times, Earth's gravitational acceleration (g) was N times the unit discharged in the prototype provided that the soil in the model and the prototype soil had the same intrinsic permeability (Arulanandan et al, 1988;Emidio et al, 2002). According to Di Emidio et al (2012;Singh and Gupta, 2002), Centrifuge Test could also be used to estimate the hydraulic conductivity of geotechnical materials in accelerated gravity conditions, reproduce the prototype vertical effective stresses in the soil samples and reduce the testing time.…”

Centrifuge simulation of LNAPL transportation in sand deposits with containment under flow and no-flow conditions

“…Previous studies of LNAPL migration in subsurface soil have included laboratory studies, numerical simulations, and field investigations [1][2][3][4][5][6][7] . All of these approaches have their limitations.…”