A Qualitative Investigation of Deposition Velocities of a Non-Newtonian Slurry in Complex Pipeline Geometries

Yokuda, Satoru T.; Poloski, Adam P.; Adkins, Harold E.; Casella, Andrew M.; Hohimer, Ryan E.; Karri, Naveen K.; Luna, Maria L.; Minette, Michael J.; Tingey, Joel M.

doi:10.2172/956901

Cited by 6 publications

(17 citation statements)

References 1 publication

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“…The purpose of the PulseEcho system was to perform non-invasive, real-time ultrasonic detection and measurement of sediment mobility and accumulation in pilot-scale pulse jet mixing vessels and the WTP M1 series initiative test loop (Poloski et al 2009a and2009b;Yokuda et al 2009). The PulseEcho system was successful in detecting solids mobility in both applications.…”

Section: Prior Applications Of Pulseechomentioning

confidence: 99%

Hanford Tank Farms Waste Certification Flow Loop Phase IV: PulseEcho Sensor Evaluation

Denslow¹,

Jenks²,

Bontha³

et al. 2011

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Executive SummaryPhase III of the Washington River Protection Solutions (WRPS) certification loop testing indicated that the PulseEcho system is an excellent candidate for detecting settled bed formation in the waste certification test loop during slurry transfer operations between Hanford tank farms and the Hanford Tank Waste Treatment and Immobilization Plant (WTP). However, the Phase III work also identified some specific areas where further development was necessary. Some of these areas included using full schedule 40 SS pipe wall thickness to mount the transducers, repeatability of the measurements, ability of PulseEcho system to detect small high density particles, lower limit of the detectable solids concentration, and effect of commonly present non-settling components in Hanford tank wastes that can influence the attenuation of the PulseEcho signal. The Phase IV of the testing presented in this report was designed to address these gaps. Testing was conducted in the Multiphase Transport Evaluation Loop (MTEL) available in the Process Development Laboratory East (PDLE) test facility of PNNL. The evaluation included the 5-MHz transducer that was previously used in Phase III and a 10-MHz transducer specifically chosen for detecting critical velocities and settled bed formation with small (>20 µm) particles. Testing was conducted with simulants specifically chosen to enable comparison with the Phase III data and also to test the limits of detection with both the 5-and 10-MHz transducers. The results obtained lead to several conclusions and recommendations:1. For >50µm particles, the performance of the 5-MHz transducer mounted at the half wall thickness was repeatable as compared with Phase III results. In addition, the performance of the 5-MHz transducers mounted at both the full and half wall thickness yielded the same results for critical velocity. Therefore, this transducer can be mounted on a near full Schedule 40 pipe wall thickness.2. The 5-MHz transducer was not capable of detecting critical velocities and settling of particles less than 30 µm. However, the particle concentration threshold for this transducer for 30 µm particles was not evaluated.3. The detection of critical velocity for particles in the WRPS desired range of 20 µm and greater requires a 10-MHz transducer.4. It is recommended that the absolute threshold mode of operation be applied with the PulseEcho system when using the 10-MHz transducer. This will allow for detection of small particle settled beds even in the highly attenuated conditions expected with many small particles distributed in the slurry.5. For highly attenuative carrier fluids, the 10-MHz transducer was capable of detecting settling of 15-30 µm sized stainless steel particles without false indications at a particle concentration of 2 wt% or higher in the detectable size range. NOTE -This minimum concentration is applicable to the small, high density stainless steel particles utilized during Phase IV testing. Additional testing is required to determine the minimum weight p...

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Section: Prior Applications Of Pulseechomentioning

confidence: 99%

Hanford Tank Farms Waste Certification Flow Loop Phase IV: PulseEcho Sensor Evaluation

Denslow¹,

Jenks²,

Bontha³

et al. 2011

Self Cite

View full text Add to dashboard Cite

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“…Deposition velocity determination is one of the design philosophies that can be employed to evaluate plugging potential. Deposition velocity is the velocity below which particles begin to deposit forming moving or stationary beds at the bottom of the pipe (Poloski et al 2009a, b;Yokuda et al 2009;Turian et al 1987;Peysson 2004;Doron and Barnea 1996;Ibarra et al 2014). This causes the flow to become unstable, and the pipe will eventually clog.…”

Section: Introductionmentioning

confidence: 99%

“…Solid particle distribution in pipelines is dictated by carrier fluid properties, solid properties, flow geometry and flow conditions such as velocity (Poloski et al 2009a, b;Yokuda et al 2009;Turian et al 1987;Ibarra et al 2014;Najmi et al 2015;Salama 2000;King et al 2001;McLaury et al 2011;Al-lababidi et al 2012;Ozbayoglu 2002;Gillies et al 2007;Rensing et al 2008;and Ma and Zhang 2008). Several flow regimes have been proposed by different researchers including Durand (1953), Newitt et al (1955), Turian et al (1987), Turian and Yuan (1977), Doron and Barnea (1996), Peysson (2004) and most recently (Ramsdell and Miedema 2013).…”

Section: Introductionmentioning

confidence: 99%

“…• Stable turbulent regime At sufficiently high flow velocities, the eddy forces are sufficient to suspend the particles in the liquid phase and maintain a uniform dispersion (Poloski et al 2009a, b;Yokuda et al 2009;Turian et al 1987;Peysson 2004;Doron and Barnea 1996). The velocity required to reach turbulent flow depends on fluid rheological properties (Poloski et al 2009a, b;Yokuda et al 2009).…”

Section: Introductionmentioning

confidence: 99%

“…The velocity required to reach turbulent flow depends on fluid rheological properties (Poloski et al 2009a, b;Yokuda et al 2009). Since particles are dispersed uniformly in the liquid phase, this regime is sometimes referred to as pseudo-homogeneous phase or simply slurry (Peysson 2004;Doron and Barnea 1996).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A comprehensive deposition velocity model for slurry transport in horizontal pipelines

Bbosa

Delle-Case

Volk

et al. 2016

J Petrol Explor Prod Technol

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Transportation of solids in form of slurries has become one of the most important unit operations in industries across several disciplines. In fact, the need is more pronounced in industries that are very important for human survival such as food processing, pharmaceuticals and energy (coal, oil and gas). A lot of work has been done in the past 30 years in understanding the factors affecting the deposition velocity of solids in slurries. Experimental observation and theoretical predictions pointed to mixture velocity and solid/fluid properties especially rheology of the resulting slurry to be the most important factors that dramatically affect particle motion and patterning. This paper presents a critical deposition velocity model and a ''stability flow map'' for complex rheology slurries. The critical deposition model utilizes a more robust generalized two-parameter rheology model to account for any given slurry rheology. The ''stability flow map'' demarcates the different flow patterns that may be observed at different mixture velocities and rheologies. On this map, the homogeneous slurries are predicted at low rheology and high mixture velocity, whereas heterogeneous slurries (with a concentration gradient) predicted at high rheology (yield stress effects). Sensitivity analysis was conducted on critical Reynolds number, particle density, carrier fluid density, generalized flow behavior index and pipe diameter. It was observed that increase in shear thinning behavior, particle density, pipe diameter and particle diameter led to a decrease in the laminar region and an increased unstable region. The model showed good performance when tested on glass and stainless steel beads test data available in open literature. Preliminary simulation with this map may help engineers select flowline size and carrier fluid rheology for a given type of solid particle.

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Flow regime and critical deposition velocity of liquid–solid two-phase flow in pipeline: Progress and perspectives

Feng,

Lei,

Zheng

et al. 2023

Physics of Fluids

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Pipeline liquid–solid two-phase flow is a significantly important multiphase flow phenomenon widely encountered in both industrial and natural settings. The flow regime of liquid–solid two-phase flow in pipelines plays a crucial role as it represents the macroscopic manifestation of the suspension diffusion mechanism and the slip deposition law of solid particles. This paper provides an overview of research related to flow regimes and critical deposition velocity (CDV) in liquid–solid two-phase flow in pipelines. After briefly reviewing pioneering theoretical research in this field, the paper focuses on recent research in flow regime identification and prediction using state-of-the-art experimental methods and techniques. The review also rigorously assesses the reliability and validity of the methods, results, and conclusions related to the establishment of the CDV, identifying the deficiencies in the current research. Drawing on dimensional analysis and Pearson correlation analysis, the particle Reynolds number is introduced to establish a highly accurate correlation for predicting the CDV under conditions of wide volume concentration. The new correlation yields a mean absolute percentage error of 9.23% and a root mean square error of 10.29% within the volume concentration range of 0.7%–50.8%. This paper aims to provide clear guidance to researchers and professionals in related industries, enabling them to conduct more in-depth investigations according to their research interest and enhance their understanding of liquid–solid two-phase flow systems within pipelines.

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A Qualitative Investigation of Deposition Velocities of a Non-Newtonian Slurry in Complex Pipeline Geometries

Cited by 6 publications

References 1 publication

Hanford Tank Farms Waste Certification Flow Loop Phase IV: PulseEcho Sensor Evaluation

Hanford Tank Farms Waste Certification Flow Loop Phase IV: PulseEcho Sensor Evaluation

A comprehensive deposition velocity model for slurry transport in horizontal pipelines

Flow regime and critical deposition velocity of liquid–solid two-phase flow in pipeline: Progress and perspectives

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