G. S. Gupta
Current Organizations / Institutes
The organizations/institutes from the scholar's latest article
Research Subjects
Research Interests
G. S. Gupta has a total of 8 co-authors. Here are the top co-authors by number of shared publications:
- Victor Rudolph
School of Chemical Engineering, The University of Queensland, St Lucia, 4072, Australia
3 shared publications V. Singh
Department of Metallurgy , Indian Institute of Science , Bangalore, India
2 shared publicationsJ. D. Litster
The University of Queensland
1 shared publicationK. Naveen
Dept. of Metallurgy, Indian Institute of Science, Bangalore 560 012, India
1 shared publication- Madivala G. Basavaraj
Indian Institute of Technology Madras
1 shared publication R. Bali
Dept. of Metallurgical and Materials Engineering, National Institute of Technology Karnataka, Surathkal 575 025, India
1 shared publication
Latest Publications
- 1 March 2006
- Published by Taylor & Francis in Chemical Engineering Communications
- Vol. 193 (3) , 338-362
PREDICTION OF MINIMUM SPOUTING VELOCITY IN TWO-DIMENSIONAL FLAT BOTTOM SPOUTED BEDS
Spouted beds have been used in industry for operations such as drying, catalytic reactions, and granulation. Conventional cylindrical spouted beds suffer from the disadvantage of scaleup. Two-dimensional beds have been proposed by other authors as a solution for this problem. Minimum spouting velocity has been studied for such two-dimensional beds. A force balance model has been developed to predict the minimum spouting velocity and the maximum pressure drop. Effect of porosity on minimum spouting velocity and maximum pressure drop has been studied using the model. The predictions are in good agreement with the experiments as well as with the experimental results of other investigators.
- 1 March 2006
- Published by Taylor & Francis in Chemical Engineering Communications
- Vol. 193 (3) , 338-362
PREDICTION OF MINIMUM SPOUTING VELOCITY IN TWO-DIMENSIONAL FLAT BOTTOM SPOUTED BEDS
Spouted beds have been used in industry for operations such as drying, catalytic reactions, and granulation. Conventional cylindrical spouted beds suffer from the disadvantage of scaleup. Two-dimensional beds have been proposed by other authors as a solution for this problem. Minimum spouting velocity has been studied for such two-dimensional beds. A force balance model has been developed to predict the minimum spouting velocity and the maximum pressure drop. Effect of porosity on minimum spouting velocity and maximum pressure drop has been studied using the model. The predictions are in good agreement with the experiments as well as with the experimental results of other investigators.
- 1 December 2005
- Published by Springer Nature in Metallurgical and Materials Transactions B
- Vol. 36 (6) , 755-764
Mechanics of raceway hysteresis in a packed bed
- 1 December 2005
- Published by Springer Nature in Metallurgical and Materials Transactions B
- Vol. 36 (6) , 755-764
Mechanics of raceway hysteresis in a packed bed
- 23 May 2005
- Published by Wiley in AIChE Journal
- Vol. 51 (8) , 2178-2189
Local liquid holdups and hysteresis in a 2‐D packed bed using X‐ray radiography
An X‐ray visualization technique has been used for the quantitative determination of local liquid holdups distribution and liquid holdup hysteresis in a nonwetting two‐dimensional (2‐D) packed bed. A medical diagnostic X‐ray unit has been used to image the local holdups in a 2‐D cold model having a random packing of expanded polystyrene beads. An aqueous barium chloride solution was used as a fluid to achieve good contrast on X‐ray images. To quantify the local liquid holdup, a simple calibration technique has been developed that can be used for most of the radiological methods such as gamma ray and neutron radiography. The global value of total liquid holdup, obtained by X‐ray method, has been compared with two conventional methods: drainage and tracer response. The X‐ray technique, after validation, has been used to visualize and quantify the liquid hysteresis phenomena in a packed bed. The liquid flows in preferred paths or channels that carry droplets/rivulets of increasing size and number as the liquid flow rate is increased. When the flow is reduced, these paths are retained and the higher liquid holdup that persists in these regions leads to the holdup hysteresis effect. Holdup in some regions of the packed bed may be an order of magnitude higher than average at a particular flow rate. © 2005 American Institute of Chemical Engineers AIChE J, 2005
- 23 May 2005
- Published by Wiley in AIChE Journal
- Vol. 51 (8) , 2178-2189
Local liquid holdups and hysteresis in a 2‐D packed bed using X‐ray radiography
An X‐ray visualization technique has been used for the quantitative determination of local liquid holdups distribution and liquid holdup hysteresis in a nonwetting two‐dimensional (2‐D) packed bed. A medical diagnostic X‐ray unit has been used to image the local holdups in a 2‐D cold model having a random packing of expanded polystyrene beads. An aqueous barium chloride solution was used as a fluid to achieve good contrast on X‐ray images. To quantify the local liquid holdup, a simple calibration technique has been developed that can be used for most of the radiological methods such as gamma ray and neutron radiography. The global value of total liquid holdup, obtained by X‐ray method, has been compared with two conventional methods: drainage and tracer response. The X‐ray technique, after validation, has been used to visualize and quantify the liquid hysteresis phenomena in a packed bed. The liquid flows in preferred paths or channels that carry droplets/rivulets of increasing size and number as the liquid flow rate is increased. When the flow is reduced, these paths are retained and the higher liquid holdup that persists in these regions leads to the holdup hysteresis effect. Holdup in some regions of the packed bed may be an order of magnitude higher than average at a particular flow rate. © 2005 American Institute of Chemical Engineers AIChE J, 2005