| dc.contributor.author | Belibagli, Kadir Bulent. | en_US |
| dc.date.accessioned | 2014-10-21T12:33:19Z | |
| dc.date.available | 1998 | |
| dc.date.issued | 1998 | en_US |
| dc.identifier.other | AAINQ39319 | en_US |
| dc.identifier.uri | http://hdl.handle.net/10222/55612 | |
| dc.description | Velocity fields in a partially-filled rotating horizontal cylinder were determined by a Laser Doppler Velocimeter as a measuring device. Two types of rotation were used: (1) Continuous rotation, (2) Sterilmatic TM simulation. To simulate the SterilmaticTM motion, an optically transparent container was rotated at quasi-constant speed and stopped periodically in order to approximate the movement of a cylindrical metal can travelling in a helical path along the inside of a large diameter horizontal retort shell. In such systems, cans of food roll when in contact with the retort shell in the lower portion of travel in the spiral track, but remain stationary when carried by the rotating reel along the upper portion of travel along the track. | en_US |
| dc.description | Velocity data were obtained for two Newtonian and two non-Newtonian fluids at different concentrations. The fluids were: water, 25, 50 and 80% glycerol/water solutions, carboxymethylcellulose (CMC) aqueous suspensions, a 2% low molecular weight CMC, 2% medium molecular weight CMC and 1.5% high molecular weight CMC, and 0.10 and 0.15% xanthan polymer in water. Three different rotational speeds (200, 300 and 350 rpm) and headspaces (0.25 cm, 0.50 cm, and 1.5 cm) were studied. | en_US |
| dc.description | Contour plots of the velocity profiles and visual observations revealed that the inertial (centrifugal), gravitational and viscous forces determined the flow structure inside the cylinder together with agitative motion of the headspace bubble. The large scale motion inside the can was found to be governed by the centrifugal and gravitational forces whereas small scale motion was dependent mostly on the apparent viscosities of the liquids. | en_US |
| dc.description | The magnitude of the mean radial velocities and tangential turbulence intensities were found to be larger than the mean tangential velocity and the radial turbulence intensity for all liquids studied. The standard deviation of the tangential velocity component was found to be 1--400% of the mean velocity obtained. The standard deviation values of the radial component of the velocity was much lower. An increase in the rotational speed significantly increased the mean radial component of velocity along the radial direction and the turbulence intensities for both Newtonian and non-Newtonian liquids. The mean velocity profiles were not affected by changes in the headspace volume, whereas the radial tangential intensities were augmented with the increase in the headspace volume. | en_US |
| dc.description | An increase in the apparent viscosity of fluids significantly suppressed turbulence inside the cylindrical container by decreasing both radial and tangential intensities. | en_US |
| dc.description | Time-velocity plots displayed periodic fluctuations which may be attributed to inherent features of the liquid motion. However, the response to changes was not the same at different locations within the fluids. | en_US |
| dc.description | Mixing in the system can be characterized in two different regions, a low rotational Reynolds number region in which the mixing in both radial and axial directions increased very sharply with increasing rotational Reynolds number, and the other region in which mixing was slightly improved or unaffected by the increase in rotational Reynolds number. (Abstract shortened by UMI.) | en_US |
| dc.description | Thesis (Ph.D.)--DalTech - Dalhousie University (Canada), 1998. | en_US |
| dc.language | eng | en_US |
| dc.publisher | Dalhousie University | en_US |
| dc.publisher | | en_US |
| dc.subject | Applied Mechanics. | en_US |
| dc.subject | Agriculture, Food Science and Technology. | en_US |
| dc.subject | Engineering, Packaging. | en_US |
| dc.title | Flow phenomena in horizontal axially rotated partially filled cylinders. | en_US |
| dc.type | text | en_US |
| dc.contributor.degree | Ph.D. | en_US |
