WorldCat Identities

Kabir, Mohd. Aslam

Overview
Works: 8 works in 8 publications in 1 language and 8 library holdings
Roles: Author
Publication Timeline
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Most widely held works by Mohd. Aslam Kabir
Characteristics of bubble rise in water and non-newtonian fluids by Mohd. Aslam Kabir( )

1 edition published in 2005 in English and held by 1 WorldCat member library worldwide

The characteristics of bubble rise phenomenon in three liquids were studied in a newly designed rig and are reported here. The experimental rig consists of two transparent cylindrical columns one a polycarbonate tube of 125 mm diameter and the other an acrylic tube of 400 mm diameter. The rig also consists of a lifting device designed to hold a video camera for taking bubble images. Water and two non-Newtonian fluids (0.025% and 0.045% by weight of polyacrylamide solutions) were used in this study. The smaller polycarbonate tube was used to study the bubble rise characteristics namely, the velocity and the drag coefficient under vacuum. The bigger acrylic tube was used to study the influence of the size of bubbles. Keywords: vacuum pan, rising velocity, massecuite, rheology, polymeric liquids
Flow visualisation investigation of water in a channel with flat plate obstruction geometry at the entry by Mohd. Aslam Kabir( )

1 edition published in 2002 in English and held by 1 WorldCat member library worldwide

ABSTRACT
Flow characteristics of low concentration non-Newtonian fluid through a channel with an obstruction at the entry by Mohd. Aslam Kabir( )

1 edition published in 2002 in English and held by 1 WorldCat member library worldwide

The flow of Newtonian fluid (eg. water) in the test channel with an obstruction at the entrance placed in a wider channel was seen to be stagnant, forward or reverse depending on the position of the obstruction. This interesting flow phenomenon has potential benefit and can be employed in the control of energy and various flows in process engineering. This study was extended to non-Newtonian fluid for further investigation using flat plate as an obstruction. A low concentration polyacrylamide fluid solution (0.018%) showing non-Newtonian fluid behavior was used in this investigation. The parameters that affect the flow inside and around the test channel were the gap (g) between the obstruction geometry and the test channel, the Reynolds number and the length of the test channel. The maximum reverse flow inside the test channel observed was 20%-25% of the outside test channel velocity at g/w (gap to width) ratio of 1 for Reynolds number of 1000 to 3500. The results of the influence of the test channel length and the Reynolds number on the velocity ration (Vi/Vo: inside velocity/outside velocity in the test channel) is also presented and discussed
Flow characteristics of Newtonian and non-Newtonian fluids in a channel with obstruction at the entry by Mohd. Aslam Kabir( )

1 edition published in 2004 in English and held by 1 WorldCat member library worldwide

"This study investigates the flow phenomena in a channel with an obstruction at the entry which is placed in another wider parallel walled channel. When obstructed, the flow phenomena inside the channel were observed to be reverse, forward or stagnant depending on the position of the obstruction. The parameters that influence the flow inside and around the test channel are: - the size and shape of the obstruction geometry, the Reynolds number and the length of the test channel. Knowledge of these phenomena has the potential benefit in the control of various flows in process engineering applications."--Abstract
Flow of water in a channel with various obstruction geometries at the entry by Mohd. Aslam Kabir( )

1 edition published in 2002 in English and held by 1 WorldCat member library worldwide

ABSTRACT
Bubble rise phenomena through Newtonian and non-Newtonian fluids by Mohd. Aslam Kabir( )

1 edition published in 2005 in English and held by 1 WorldCat member library worldwide

The characteristics of bubble rise phenomenon in three liquids were investigated and are reported here. The experimental rig consists of two transparent cylindrical columns one a polycarbonate tube of 125 mm diameter and the other an acrylic tube of 400 mm diameter. The rig also consists of a lifting device designed to hold a video camera for taking bubble images. Water and two non-Newtonian fluids (0.025% and 0.045% by weight of polyacrylamide solutions) were used in this study. The smaller polycarbonate tube was used to study the velocity and the drag coefficient under vacuum. The bigger acrylic tube was used to study the influence of the size of bubbles
A comparative study of the flow phenomena of water and mixed solution in a channel with obstruction : influence of shapes by Mohd. Aslam Kabir( )

1 edition published in 2005 in English and held by 1 WorldCat member library worldwide

The effect of shapes of the obstruction geometry on the flow phenomena of a non-Newtonian mixed solution in a channel is investigated and compared with that of water (Newtonian fluid). The investigation is carried out at a fixed Reynolds number of 2000 for both the fluids. The shapes used were: flat plate, triangular, semicircular and circular. The reason for choosing a mixed solution, a non-Newtonian fluid, is that the most fluids used in industry are non-Newtonian in nature. The flow phenomena were investigated using velocity measurement (quantitative measurement) and flow visualization (qualitative measurement) images. It was found that the flat plate obstruction geometry produce the maximum reverse flow inside the test channel whereas circular obstruction geometry produce the least reverse flow
Numerical modelling of reverse flow phenomena in a channel with obstruction geometry at the entry by Mohd. Aslam Kabir( )

in English and held by 1 WorldCat member library worldwide

Numerical modelling and simulation of the reverse flow phenomenon in a channel with obstruction geometry at the entry were performed using CFD-ACE+ simulation solver. Obstruction geometries used for simulation were triangle, circle, semicircle and flat plate. Simulations were performed for different gap to width ratio, for different gap between the test channel and obstruction geometry, and for different Reynolds number. The simulated results are discussed and compared with flow visualization images. Simulations results predicted the occurrence of reverse flow and existence of other flow features such as vortex shedding at both ends. The numerically predicted results of the flow phenomena are generally in good agreement with the experimentally observed flow visualization images
 
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