A new method for characterizing turbulent mixing in semiconcentrated suspensions
Source abstract
Abstract
A high-frequency conductivity probe was used in conjunction with advanced signal processing to measure the turbulent fluctuations of a passive scalar, namely a saline solution, injected into semiconcentrated, monodispersed suspensions consisting of either 2-mm rayon fibers or 130-μm microspheres. The probe was mounted in a pipe flow so that its radial position could be adjusted manually. A saline solution was injected into the centerline of the pipe at a specified velocity relative to the suspension flow. The mean conductivity signal gathered with this tool enabled estimation of the local concentration of salt at a given point in the flow, i.e., the mean spatial dispersion of the dosed component. Further analysis of the high-frequency fluctuating signal enables characterization of the local mixing energy and turbulent spectrum, i.e., the spectral mixing scales available in the suspensions under a given set of conditions.
Source: crossref · Quality: baseline
Research context
OpenAlex topics: Particle Dynamics in Fluid Flows · Microfluidic and Bio-sensing Technologies · Hydrology and Sediment Transport Processes
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (9)
Show source-provided references
1. Hubbe, M., Nanko, H., and McNeal, M., BioResoures 4(2): 850(2009).10.15376/biores.4.2.850-906 ↗
2. Norman, B. and Tegengren, Å., EUCEPA Conf. Proc., EUCEPA, Harrogate, UK, 1988, p. 52.
3. Forney, L., Encyclopedia of Fluid Mechanics Vol. 2—Dynamics of Single Fluid Flows and Mixing, Gulf Publishing, Houston, TX, USA, 1986, p. 66.
4. Kerekes, R. and Schell, C., J. Pulp Pap. Sci. 18(1): 32(1992).
5. Hetsroni, G., Int. J. Multiphase Flow 15(5): 735(1989).10.1016/0301-9322(89)90037-2 ↗
6. Kulick J.D., Fessler, J.R., and Eaton, J.K., J. Fluid Mech. 277(1): 109(1994).10.1017/S0022112094002703 ↗
7. Rogers, C.B. and Eaton, J.K., Phys. Fluids A 3(5): 928(1991).10.1063/1.857969 ↗
8. Fällman, M., “Turbulence measurements in fiber suspensions: Experimental methods and results,” Ph.D. thesis, Royal Institute of Technology, Stockholm, Sweden, 2009.
9. Norman, B. and Wahren, D., Sven. Papperstidn. 75(1): 807(1972).