Critical Sand Deposition Velocity in Horizontal Stratified Flow

2014 ◽  
Author(s):  
Roberto Ibarra ◽  
Ram S. Mohan ◽  
Ovadia Shoham
Keyword(s):  
Deposition Velocity ◽  
Stratified Flow ◽  
Sand Deposition

Investigation of Critical Sand-Deposition Velocity in Horizontal Gas/Liquid Stratified Flow

2017 ◽  
Vol 32 (03) ◽  
pp. 218-227 ◽  
Author(s):  
Roberto Ibarra ◽  
Ram S. Mohan ◽  
Ovadia Shoham
Keyword(s):  
Deposition Velocity ◽  
Stratified Flow ◽  
Sand Deposition

Sand Transport in Slightly Upward Inclined Multiphase Flow

2018 ◽  
Vol 140 (7) ◽  
Author(s):  
Ramin Dabirian ◽  
Ram Mohan ◽  
Ovadia Shoham ◽  
Gene Kouba
Keyword(s):  
Flow Regime ◽  
Water Flow ◽  
Deposition Velocity ◽  
Stratified Flow ◽  
Flow Regimes ◽  
Test Facility ◽  
Sand Transport ◽  
Deposition Condition ◽  
Sand Flow ◽  
Sand Deposition

In order to assess the critical sand deposition condition, a unique 4-in ID test facility was designed and constructed, which enables the pipe to be inclined 1.5 deg upward. Experiments were conducted with air–water-glass beads at low sand concentrations (< 10,000 ppm), and the air and water flow rates were selected to ensure stratified flow regime along the pipe. At constant superficial liquid velocity, the gas velocity was reduced to find the critical sand deposition velocity. Six sand flow regimes are identified, namely, fully dispersed solid flow, dilute solids at the wall, concentrated solids at the wall, moving dunes, stationary dunes, and stationary bed. The experimental results reveal that sand flow regimes under air–water stratified flow are strong functions of phase velocities, particle size, and particle concentration. Also, the results show that air–water flow regime plays an important role in particle transport; slug flow has high capability to transport particles at the pipe bottom, while the stratified flow has high risk of sand deposition. As long as the sand dunes are observed at the pipe bottom, the critical sand deposition velocities slightly increase with concentrations, while for stationary bed, the critical velocity increases exponentially with concentration.

Sand Flow Regimes in Slightly Upward Inclined Gas-Liquid Stratified Flow

2016 ◽  
Author(s):  
Ramin Dabirian ◽  
Ram S. Mohan ◽  
Ovadia Shoham ◽  
Gene Kouba
Keyword(s):  
Flow Regime ◽  
Water Flow ◽  
Liquid Velocity ◽  
Sand Dunes ◽  
Deposition Velocity ◽  
Stratified Flow ◽  
Test Facility ◽  
Deposition Condition ◽  
Sand Particles ◽  
Sand Deposition

Sand particles are produced from the reservoir with low formation strength. A sand management system is required to be designed to keep the sand particles moving so as to prevent them from accumulating in the pipeline. Operating under unnecessarily high fluid velocities is not cost effective, moreover, it can lead to equipment failure; therefore, it is required to find the minimum velocity, known as critical sand deposition velocity, to keep the particles constantly moving. In order to assess the critical sand deposition condition, a unique test facility was designed and constructed with 4-in ID PVC pipeline, which enables the pipe to be inclined 1.5° upward. Experiments were conducted with air-water-glass beads at low sand concentrations (< 10,000 ppm), and the air and water flow rates were selected to ensure stratified flow regime along the pipe. At constant superficial liquid velocity the gas velocity was reduced to find the critical sand deposition velocity. The experimental results reveal that air-water flow regime plays an important role in particle transport; slug flow has high capability to transport particles at the pipe bottom, while the stratified flow has high risk of sand deposition. As long as the sand dunes are observed at the pipe bottom, the critical sand deposition velocities slightly increase with concentrations, while for stationary bed, the critical velocity increases exponentially with concentration.

Numerical Simulation and Modeling of Critical Sand-Deposition Velocity for Solid/Liquid Flow

2018 ◽  
Vol 33 (04) ◽  
pp. 866-878 ◽  
Author(s):  
Ramin Dabirian ◽  
Hadi Arabnejad Khanouki ◽  
Ram S. Mohan ◽  
Ovadia Shoham
Keyword(s):  
Numerical Simulation ◽  
Liquid Flow ◽  
Deposition Velocity ◽  
Simulation And Modeling ◽  
Solid Liquid ◽  
Sand Deposition

Critical Sand Deposition Velocity in Intermittent Flow – Models Evaluation

2019 ◽  
Author(s):  
Ramin Dabirian ◽  
Mobina Mohammadikharkeshi ◽  
Ram Mohan ◽  
Ovadia Shoham
Keyword(s):  
Deposition Velocity ◽  
Intermittent Flow ◽  
Flow Models ◽  
Sand Deposition
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