Effect of the liquid layer on the impact behavior of particles

S. Antonyuk, S. Heinrich, M. Dosta, M.S. Buijtenen, van, N.G. Deen, J.A.M. Kuipers

Research output: Contribution to conferenceOtherAcademic

Abstract

During a spray granulation process the moisture loading in fluidized beds has a great influence on the inter-particle collision properties and hence on the flow behaviour. To study the influence of the liquid layer as well as granule impact velocity on the impact behaviour free-fall experiments were performed. During these experiments the g-Al2O3 granules were dropped from a predefined height onto a liquid layer on the flat steel wall and the velocity-time curves were obtained using highspeed video recording. The height of the liquid layer was varied from 50 mm to 1 mm. Moreover, the tests were performed at different velocities and viscosities of liquid layer in the range of 1-300 mPa.s. Both distilled water and water solutions of hydroxypropyl methylcellulose with different concentrations (3, 6, 10 mass-%) were used. The obtained restitution coefficients were compared with the experiments performed without liquid film on the surface. For a granule impacted on a liquid film on the wall, the increase of liquid viscosity decreases the restitution coefficient and thickness of liquid layer at which the granule sticks. In the examined velocity range, with decreasing impact velocity the restitution coefficient greatly decreases. To explain the obtained effects the force and energy balances for a particle impacted on a liquid layer on the wall were derived. Both contributions to energy absorption (granule-liquid layer and granule-wall contacts) have been taken into consideration.

Conference

Conference9th International Symposium on Agglomeration and 4th International Granulation Workshop, June 24-26, 2009, Sheffield, UK
CountryUnited Kingdom
CitySheffield
Period24/06/0926/06/09
Internet address

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liquids
impact velocity
coefficients
viscosity
free fall
particle collisions
energy absorption
moisture
water
sprayers
beds
recording
steels
curves
energy

Cite this

Antonyuk, S., Heinrich, S., Dosta, M., Buijtenen, van, M. S., Deen, N. G., & Kuipers, J. A. M. (2009). Effect of the liquid layer on the impact behavior of particles. 9th International Symposium on Agglomeration and 4th International Granulation Workshop, June 24-26, 2009, Sheffield, UK, Sheffield, United Kingdom.
Antonyuk, S. ; Heinrich, S. ; Dosta, M. ; Buijtenen, van, M.S. ; Deen, N.G. ; Kuipers, J.A.M./ Effect of the liquid layer on the impact behavior of particles. 9th International Symposium on Agglomeration and 4th International Granulation Workshop, June 24-26, 2009, Sheffield, UK, Sheffield, United Kingdom.10 p.
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title = "Effect of the liquid layer on the impact behavior of particles",
abstract = "During a spray granulation process the moisture loading in fluidized beds has a great influence on the inter-particle collision properties and hence on the flow behaviour. To study the influence of the liquid layer as well as granule impact velocity on the impact behaviour free-fall experiments were performed. During these experiments the g-Al2O3 granules were dropped from a predefined height onto a liquid layer on the flat steel wall and the velocity-time curves were obtained using highspeed video recording. The height of the liquid layer was varied from 50 mm to 1 mm. Moreover, the tests were performed at different velocities and viscosities of liquid layer in the range of 1-300 mPa.s. Both distilled water and water solutions of hydroxypropyl methylcellulose with different concentrations (3, 6, 10 mass-{\%}) were used. The obtained restitution coefficients were compared with the experiments performed without liquid film on the surface. For a granule impacted on a liquid film on the wall, the increase of liquid viscosity decreases the restitution coefficient and thickness of liquid layer at which the granule sticks. In the examined velocity range, with decreasing impact velocity the restitution coefficient greatly decreases. To explain the obtained effects the force and energy balances for a particle impacted on a liquid layer on the wall were derived. Both contributions to energy absorption (granule-liquid layer and granule-wall contacts) have been taken into consideration.",
author = "S. Antonyuk and S. Heinrich and M. Dosta and {Buijtenen, van}, M.S. and N.G. Deen and J.A.M. Kuipers",
year = "2009",
language = "English",
note = "9th International Symposium on Agglomeration and 4th International Granulation Workshop, June 24-26, 2009, Sheffield, UK ; Conference date: 24-06-2009 Through 26-06-2009",
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Antonyuk, S, Heinrich, S, Dosta, M, Buijtenen, van, MS, Deen, NG & Kuipers, JAM 2009, 'Effect of the liquid layer on the impact behavior of particles' 9th International Symposium on Agglomeration and 4th International Granulation Workshop, June 24-26, 2009, Sheffield, UK, Sheffield, United Kingdom, 24/06/09 - 26/06/09, .

Effect of the liquid layer on the impact behavior of particles. / Antonyuk, S.; Heinrich, S.; Dosta, M.; Buijtenen, van, M.S.; Deen, N.G.; Kuipers, J.A.M.

2009. 9th International Symposium on Agglomeration and 4th International Granulation Workshop, June 24-26, 2009, Sheffield, UK, Sheffield, United Kingdom.

Research output: Contribution to conferenceOtherAcademic

TY - CONF

T1 - Effect of the liquid layer on the impact behavior of particles

AU - Antonyuk,S.

AU - Heinrich,S.

AU - Dosta,M.

AU - Buijtenen, van,M.S.

AU - Deen,N.G.

AU - Kuipers,J.A.M.

PY - 2009

Y1 - 2009

N2 - During a spray granulation process the moisture loading in fluidized beds has a great influence on the inter-particle collision properties and hence on the flow behaviour. To study the influence of the liquid layer as well as granule impact velocity on the impact behaviour free-fall experiments were performed. During these experiments the g-Al2O3 granules were dropped from a predefined height onto a liquid layer on the flat steel wall and the velocity-time curves were obtained using highspeed video recording. The height of the liquid layer was varied from 50 mm to 1 mm. Moreover, the tests were performed at different velocities and viscosities of liquid layer in the range of 1-300 mPa.s. Both distilled water and water solutions of hydroxypropyl methylcellulose with different concentrations (3, 6, 10 mass-%) were used. The obtained restitution coefficients were compared with the experiments performed without liquid film on the surface. For a granule impacted on a liquid film on the wall, the increase of liquid viscosity decreases the restitution coefficient and thickness of liquid layer at which the granule sticks. In the examined velocity range, with decreasing impact velocity the restitution coefficient greatly decreases. To explain the obtained effects the force and energy balances for a particle impacted on a liquid layer on the wall were derived. Both contributions to energy absorption (granule-liquid layer and granule-wall contacts) have been taken into consideration.

AB - During a spray granulation process the moisture loading in fluidized beds has a great influence on the inter-particle collision properties and hence on the flow behaviour. To study the influence of the liquid layer as well as granule impact velocity on the impact behaviour free-fall experiments were performed. During these experiments the g-Al2O3 granules were dropped from a predefined height onto a liquid layer on the flat steel wall and the velocity-time curves were obtained using highspeed video recording. The height of the liquid layer was varied from 50 mm to 1 mm. Moreover, the tests were performed at different velocities and viscosities of liquid layer in the range of 1-300 mPa.s. Both distilled water and water solutions of hydroxypropyl methylcellulose with different concentrations (3, 6, 10 mass-%) were used. The obtained restitution coefficients were compared with the experiments performed without liquid film on the surface. For a granule impacted on a liquid film on the wall, the increase of liquid viscosity decreases the restitution coefficient and thickness of liquid layer at which the granule sticks. In the examined velocity range, with decreasing impact velocity the restitution coefficient greatly decreases. To explain the obtained effects the force and energy balances for a particle impacted on a liquid layer on the wall were derived. Both contributions to energy absorption (granule-liquid layer and granule-wall contacts) have been taken into consideration.

M3 - Other

ER -

Antonyuk S, Heinrich S, Dosta M, Buijtenen, van MS, Deen NG, Kuipers JAM. Effect of the liquid layer on the impact behavior of particles. 2009. 9th International Symposium on Agglomeration and 4th International Granulation Workshop, June 24-26, 2009, Sheffield, UK, Sheffield, United Kingdom.