Vivek V. Buwa
Facilities

Electrical Resistance Tomography (ERT)
 
 
Data Acquisition System  
Photograph of ERT set-up  Sensor   
 
Specification:
Sensor :

2 sensors, each having 16 electrodes
Time-resolution : up to 30 fps
Spatial-resolution : 5 - 10% of the column ID
Image reconstruction algorithm : Modified Sensitivity Back Projection (MSBP)
OEM : Industrial Tomography Systems (ITS) Inc., UK 
Applications:

•   Dense gas-liquid flow in bubble columns

•   Local liquid distribution in trickle beds
 
The ability of the ERT to measure time-resolved liquid hold-up distribution was verified by comparing the measurements performed using voidage sensors, for artificially created pulsing flow with varying pulse widths. The effects of liquid and gas flow rates on the spatial distribution of were also investigated for different liquid distributor configurations. (Singh et al., 2018)
 
   
Cylindrical bubble column experimental setup at IITD for characterization of gas-liquid flow in a bubble column Gas volume fraction fluctuations in a bubble-column (Singh et al., 2017) 
   
Publications/conference presentations:

  • Brajesh K. Singh,Ekta Jain  and Vivek V. Buwa, "Measurements of Local Liquid Holdup Distribution and Flow Structures in a Trickle Bed using Electrical Resistance Tomography and Voidage Sensor", submitted to Chemical Engineering Journal (2018)

  • Brajesh Kumar Singh, Abdul Quiyoom and Vivek V. Buwa, "Dynamics of Gas-Liquid Flow in a Cylindrical Bubble Column: Comparison of Electrical Resistance Tomography and Voidage Probe Measurements", 2017, Chemical Engineering Science, 158, 124-139.

  • Ekta Jain, Brajesh K. Singh and Vivek V. Buwa, “Measurements of Local Liquid Volume Fraction Distribution and Flow Structures in a Trickle Bed using Electrical Resistance Tomography and Voidage Probes”, Presented at 13th International Conference on Gas-Liquid and Gas-Liquid-Solid Reaction Engineering (GLS 13), Brussels (Belgium), 20-23 August 2017.

  • Brajesh K. Singh, Ekta Jain,  and Vivek V. Buwa, “Spatial- and Time-resolved Measurements of Liquid Hold-up Distribution in a Packed Bed using Electrical Resistance Tomography and Voidage-Probes”, Presented at 9th International Conference on Multiphase Flow (ICMF 2016), Florence (Italy), 22-27 May 2016.

  • Brajesh K. Singh, Abdul Quiyoom, Shantanu Roy, Vivek V. Buwa. "Instantaneous and Time-averaged Gas Volume Fraction Measurements in a Cylindrical Bubble Column: Comparison of Electrical Resistance Tomography and Voidage Probe Measurements". Presented at IUTAM, IIT Hyderabad, 8 – 11 December 2014