A new correlation for minimum spouting velocity for conical spouted beds operating with high density particles

Date

2018-09-01

Author

GOLSHAN, Shahab
YAMAN, Onur
KÖKSAL, MURAT
Külah, Görkem
ZARGHAMI, Reza
MOSTOUFI, Navid

Metadata

Show full item record

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

Item Usage Stats

174
views

0
downloads

Hydrodynamics of conical spouted beds operating with high density particles was studied by means of measuring the minimum spouting velocity and analysis of pressure signals in time and frequency domains. Three different types of particles, zirconia (d(p) = 1 mm; rho(p) = 6050 kg/m(3)), zirconia toughened alumina (rho(p) = 3700 kg/m(3); d(p) = 1, 2 and 2.4 mm) and glass beads (rho(p) = 2460 kg/m(,)(3) d(p) = 1 and 2 mm) were used in the experiments. Experiments were performed in three small scale (gamma = 30 degrees, 45 degrees and 60 degrees) and two large scale (gamma = 31 degrees and 66 degrees) beds at different gas inlet diameters and static bed heights. It was found by the analysis of pressure signals that the pressure drop in the stable spouting bed increases with increasing bed size, static bed height, gas inlet diameter and density of particles, and decreasing particle size and cone angle. The minimum spouting velocity increases with increasing particle size, cone angle, static bed height and density of particles, and decreasing bed size and gas inlet diameter. Power spectral density of the pressure signals also revealed significant influence of the above mentioned parameters on the hydrodynamics of conical spouted beds. Based on the results of the experiments, a new correlation is proposed for prediction of the minimum spouting velocity in conical spouted beds operating within the density range of 2460-6050 kg/m(3) particles. The average relative error and correlation coefficient of the proposed correlation was found to be 10.55% and 0.95, respectively, which shows the potential of the proposed correlation for prediction of the minimum spouting velocity in conical spouted beds with high density particles.

Subject Keywords

Mechanical Engineering, Nuclear Energy and Engineering, General Chemical Engineering, Fluid Flow and Transfer Processes, Aerospace Engineering

URI

https://hdl.handle.net/11511/47847

Journal

EXPERIMENTAL THERMAL AND FLUID SCIENCE

DOI

https://doi.org/10.1016/j.expthermflusci.2018.03.027

Collections

Department of Chemical Engineering, Article

Suggestions

OpenMETU
Core

Detecting stability of conical spouted beds based on information entropy theory Savari, Chiya; Sotudeh-Gharebagh, Rahmat; Külah, Görkem; KÖKSAL, MURAT; Mostoufi, Navid (Elsevier BV, 2019-02-01) Effects of particle size, particle density, gas inlet diameter and static bed height on the stability of operation in conical spouted beds were investigated through analyses of information entropy of pressure fluctuations. In this respect, the maximum information entropy of pressure fluctuations was used as a stability criterion. The results showed that stability of the bed increases with an increase in the maximum entropy. The maximum information entropy of pressure fluctuations increases with increasing p...
An experimental investigation on performance of annular fins on a horizontal cylinder in free convection heat transfer Yildiz, S; Yüncü, Hafit (Springer Science and Business Media LLC, 2004-02-01) Natural convection heat transfer in annular fin-arrays mounted on a horizontal cylinder was experimentally investigated. An experimental set-up was constructed to investigate heat transfer characteristics of 18 sets of annular fin-arrays mounted on a horizontal cylinder of 24.9-mm diameter in atmospheric conditions. Keeping the fin thickness fixed at 1 mm, fin diameter is varied from 35 mm to 125 mm and fin spacing is varied from 3.6 mm to 31.7 mm. The base-to-ambient temperature difference was also varied ...
A new modal superposition method for nonlinear vibration analysis of structures using hybrid mode shapes Ferhatoglu, Erhan; Ciğeroğlu, Ender; Özgüven, Hasan Nevzat (Elsevier BV, 2018-07-01) In this paper, a new modal superposition method based on a hybrid mode shape concept is developed for the determination of steady state vibration response of nonlinear structures. The method is developed specifically for systems having nonlinearities where the stiffness of the system may take different limiting values. Stiffness variation of these nonlinear systems enables one to define different linear systems corresponding to each value of the limiting equivalent stiffness. Moreover, the response of the n...
On the wake pattern of symmetric airfoils for different incidence angles at Re=1000 Kurtuluş, Dilek Funda (SAGE Publications, 2016-06-01) In the current study, numerical simulations are performed in order to investigate effects of incidence angle and airfoil thickness on alternating vortex pattern of symmetric airfoils at Re = 1000. This alternating vortex pattern is found to be significantly varying in shape as the incidence angle increases. The results are obtained with 1 degrees increment from 0 degrees to 41 degrees and then with 10 degrees increment from 40 degrees until 180 degrees. The instantaneous and mean vortex patterns are investi...
A Mechanistic Model for Predicting Frictional Pressure Losses for Newtonian Fluids in Concentric Annulus SORGUN, MEHMET; Ozbayoglu, M. E. (Informa UK Limited, 2010-01-01) A mathematical model is introduced estimating the frictional pressure losses of Newtonian fluids flowing through a concentric annulus. A computer code is developed for the proposed model. Also, extensive experiments with water have been conducted at Middle East Technical University, Petroleum and Natural Gas Engineering Department Flow Loop and recorded pressure drop within the test section for various flow rates. The performance of the proposed model is compared with computational fluid dynamics (CFD) soft...

Citation Formats

S. GOLSHAN, O. YAMAN, M. KÖKSAL, G. Külah, R. ZARGHAMI, and N. MOSTOUFI, “A new correlation for minimum spouting velocity for conical spouted beds operating with high density particles,” EXPERIMENTAL THERMAL AND FLUID SCIENCE, pp. 358–370, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/47847.