Prediction of bubble dynamics in a fluidized bed by the measurement of pressure oscillations

Date

1998-07-29

Author

Parlak, M
Patoglu, V
Sayar, A
Vural, H

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

29
views

0
downloads

In the present study, the pressure fluctuations in a two-dimensional transparent fluidized bed are measured by a pressure transducer such that the bubble formation and movement can be detected from the signals. Bubble movement is recorded by a video camera and signals obtained from the pressure transducer are stored in a computer. Bubble diameters and rise velocities are determined from pressure-time data utilizing image and signal processing techniques.

URI

https://hdl.handle.net/11511/67798

Conference Name

2nd Trabzon International Energy and Environment Symposium

Collections

Department of Mechanical Engineering, Conference / Seminar

Suggestions

OpenMETU
Core

Modeling of fluid -vapor interface in the condensation zone of a grooved heat pipe Alipour, Mobin; Dursunkaya, Zafer; Department of Mechanical Engineering (2017) Condensation in grooved heat pipes involves several simultaneous phenomena including vapor-liquid boundaries whose shapes are unknown a priori, fluid flow due to capillary and dispersion pressure gradients and condensation over ultra thin films. In grooved heat pipes, the majority of condensation occurs on fin tops due to the thinner liquid film, having a lower thermal resistance, compared to inside the groove where the fluid is substantially thicker. Majority of the studies in the literature assume an appr...
MODELING OF EVAPORATION FROM A SESSILE CONSTANT SHAPE DROPLET Akkus, Yigit; ÇETİN, BARBAROS; Dursunkaya, Zafer (2017-08-30) In this study, a computational model for the evaporation from a sessile liquid droplet fed from the center to keep the diameter of the droplet constant is presented. The continuity, momentum and energy equations are solved with temperature dependent thenno-physical properties using COMSOL Multi-physics. At the surface of the droplet, convective heat and evaporative mass fluxes are assigned. Since the flow field is affected by evaporative flux, an iterative scheme is built and the computation is automated us...
Analysis of Local Thermal Equilibrium Assumption in Transient Forced Convection in a Graphite Foam Channel Gürüf, Gürşah; Solmaz, İsmail; Bayer, Özgür (2020-12-01) In this study, the validity of Local Thermal Equilibrium (LTE) assumption in the transient forced convection of a rectangular channel filled with a block of graphite foam is examined numerically. The governing macroscopic energy conservation equations for solid and gas phases are derived by taking the average of the microscopic one over the averaging volume. Initially, LTE is in existence between the phases and then, the fluid temperature at the channel inlet is suddenly raised. Besides, an appropriate insu...
Modeling of environmental temperature dependency for sensors operated by sagnac effect Alaçakır, Ece; Çakır, Serhat; Department of Physics (2019) In this thesis, the purpose is that theoretical, experimental and simulation environment are combined to observe and model the thermal sensitivity of a gyroscope which is operated by the principle of Sagnac effect. It is essential to enhance the knowledge and experience, and to gain ability to simulate for different thermal conditions for future developments of the advanced gyroscope technologies. This thesis investigates how external temperature change influences the performance of fiber optic gyroscopes, ...
Measurement of the production cross section for pairs of isolated photons in pp collisions at root s=7 TeV Chatrchyan, S.; et. al. (Springer Science and Business Media LLC, 2012-01-01) The integrated and differential cross sections for the production of pairs of isolated photons is measured in proton-proton collisions at a centre-of-mass energy of 7TeV with the CMS detector at the LHC. A data sample corresponding to an integrated luminosity of 36 pb(-1) is analysed. A next-to-leading-order perturbative QCD calculation is compared to the measurements. A discrepancy is observed for regions of the phase space where the two photons have an azimuthal angle difference Delta phi less than or sim...

Citation Formats

M. Parlak, V. Patoglu, A. Sayar, and H. Vural, “Prediction of bubble dynamics in a fluidized bed by the measurement of pressure oscillations,” KARADENIZ TECH UNIV, TRABZON, TURKEY, 1998, p. 111, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/67798.