Critical Sand Deposition Velocity in Horizontal Stratified Flow

Ibarra, Roberto; Mohan, Ram S.; Shoham, Ovadia

doi:10.2118/168209-ms

Cited by 29 publications

(16 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Transportability of solids in pipelines strongly depends on particle distribution [1,7]. Solid particle distribution in pipelines is dictated by carrier fluid properties, solid properties, flow geometry and flow conditions such as velocity [1][2][3][4][7][8][9][10][11][12][13][14][15][16].…”

Section: Solid Transport Phenomena: Flow Regimes and The Stability Mapmentioning

confidence: 99%

“…Solid particle distribution in pipelines is dictated by carrier fluid properties, solid properties, flow geometry and flow conditions such as velocity [1][2][3][4][7][8][9][10][11][12][13][14][15][16]. Several flow regimes have been proposed by different researchers including Durand (1950s) [17], Newitt (1950s) [18], Turian (1970s) [4,19], Doron (1990s) [6], Peysson (2004) [5] and most recently Ramsdell (2013) [20].…”

Section: Solid Transport Phenomena: Flow Regimes and The Stability Mapmentioning

confidence: 99%

“…This regime is characterized by presence of solid particle concentration gradient perpendicular to the flow direction [1][2][3][4][5][6][7][8][9][10]. Because of this non-uniform particle distribution, this regime is sometimes referred to as heterogeneous flow regime [5][6][7][8]. This is the most practical solid transport regime for high viscosity and/or high yield stress fluids.…”

Section: Solid Transport Phenomena: Flow Regimes and The Stability Mapmentioning

confidence: 99%

“…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 [1][2][3][4][5][6][7]. This causes the flow to become unstable and the pipe will eventually clog.…”

Section: Introductionmentioning

confidence: 99%

“…Partial pipeline blockages may lead to erosion, corrosion and local velocity increase [8]. For non-interacting solid particles, such as coal, sand and glass, plugging results from transporting slurries at velocities lower than the deposition velocity [7][8][9][10][11][12]. Most deposition models and experimental investigation in open literature focuses on Newtonian carrier fluids.…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Avoiding Flowline Plugging: A Deposition Velocity Model and Stability Map

et al. 2016

View full text Add to dashboard Cite

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 Љstability flow mapЉ for complex rheology slurries. The critical deposition model utilizes a more robust generalized 2-parameter rheology model to account for any given slurry rheology. The Љstability flow mapЉ demarcates the different flow patterns that may be observed at different mixture velocity and rheology. 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. The model was tested on hydrate slurries generated with additives at The University of Tulsa and the flow regime predictions were in good agreement with observations.Preliminary simulation with this map may help engineers select flowline size and carrier fluid rheology for a given type of solid particle.

show abstract

Section: Solid Transport Phenomena: Flow Regimes and The Stability Mapmentioning

confidence: 99%

Section: Solid Transport Phenomena: Flow Regimes and The Stability Mapmentioning

confidence: 99%

Section: Solid Transport Phenomena: Flow Regimes and The Stability Mapmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Avoiding Flowline Plugging: A Deposition Velocity Model and Stability Map

et al. 2016

View full text Add to dashboard Cite

show abstract

A generalized model to predict minimum particle transport velocities in multiphase air–water horizontal pipes

et al. 2015

View full text Add to dashboard Cite

A new model is proposed to predict minimum flow rates required to constantly move particles in both intermittent and stratified flow regimes. The new model consists of a single‐phase flow model along with an appropriate length scale to be extended to multiphase flow regime. A comparison of the new model with experimental data in a multiphase air–water flow shows that the new model is able to predict minimum flow rates well for a wide range of operating conditions. The new model can capture the effects of particle size, particle concentration, and pipe size as confirmed by experimental data. A comparison of the new model with previously proposed models in the literature shows that the new model improves critical velocity predictions significantly. Moreover, the new model is the only model that takes into account the effect of particle concentration and can predict critical velocity in both intermittent and stratified flow regimes. © 2015 American Institute of Chemical Engineers AIChE J, 61: 2634–2646, 2015

show abstract

An experimental study on the startup velocity and motion characteristics of sand beds in air–water pipelines

Zhang

Yang

et al. 2022

Energy Science & Engineering

View full text Add to dashboard Cite

Sand deposition in the wellbore is one of the most common problems in oil-gas and hydrate exploitation work. A detailed understanding of the migration characteristics of the sand bed and accurate prediction of the starting velocity of the sand bed are key aspects of effective sand carrying.Therefore, this study conducted a large-scale outdoor gas-water-sand threephase flow experiment. The effects of critical factors such as flow pattern, sand size, sand bed height, and pipe inclination angle on sand bed startup velocity and migration were studied experimentally. The experimental results indicated that during the startup process of the sand bed, sand particles exhibited three states: rolling, jumping, and suspension. During the experiment, the sand bed morphology included a static bed, rolling bed, jumping bed, and suspension bed. Compared to a stratified flow, intermittent flow and agitated flow were more beneficial for the startup velocity of sand beds. An increase in pipe inclination also reduced the starting velocity of the sand bed. With an increase in sand size, the startup velocity of the sand bed increased correspondingly. However, there was no significant influence on the migration morphology of the sand bed. Additionally, the greater the thickness of the sand bed, the lower the starting velocity of the sand bed. Based on the stress states of sand grains, in combination with experimental data, this study used least-squares estimation to establish a prediction model for the startup velocity of sand beds. The model prediction results were in good agreement with the experimental data. This study will provide a basis for predicting the startup velocity of sand beds during the gas-liquid two-phase sand-carrying process.

show abstract

Critical Sand Deposition Velocity in Horizontal Stratified Flow

Cited by 29 publications

References 7 publications

Avoiding Flowline Plugging: A Deposition Velocity Model and Stability Map

Avoiding Flowline Plugging: A Deposition Velocity Model and Stability Map

A generalized model to predict minimum particle transport velocities in multiphase air–water horizontal pipes

An experimental study on the startup velocity and motion characteristics of sand beds in air–water pipelines

Contact Info

Product

Resources

About