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Görkem Külah

E-mail
gorkemk@metu.edu.tr
Department
Department of Chemical Engineering
Scopus Author ID
Web of Science Researcher ID
Performance of banded SLW-1 in presence of non-gray walls and particles in fluidized bed combustors
Yaşar, Mehmet Soner; Ozen, Guzide; Selçuk, Nevin; Külah, Görkem (Elsevier BV, 2020-12-01)
In this study, banded one gas spectral line-based weighted sum of gray gases (banded SLW-1) model is coupled with a 3-D radiation code based on method of lines (MOL) solution of discrete ordinates method (DOM) for freeboar...
Assessment of improved banded model for spectral thermal radiation in presence of non-gray particles in fluidized bed combustors
Yaşar, Mehmet Soner; Ozen, Guzide; Selçuk, Nevin; Külah, Görkem (2020-07-01)
In this study, Bordbar's banded model is coupled with a 3-D radiation model based on method of lines (MOL) solution of discrete ordinates method (DOM) for modeling of radiative heat transfer in freeboard of METU 0.3 MWt AB...
Comment on "Deciphering conical spouted bed hydrodynamics using high intensity microphone"
Yaman, Onur; KÖKSAL, MURAT; Külah, Görkem (Elsevier BV, 2019-11-01)
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....
Surface-to-bed heat transfer for high-density particles in conical spouted and spout-fluid beds
Yaman, Onur; Külah, Görkem; KÖKSAL, MURAT (Elsevier BV, 2019-02-01)
Bed-to-surface heat transfer experiments from a vertically submerged cylindrical surface were conducted in laboratory-scale (D-c = 25 cm) conical spouted and spout-fluid beds at two different conical angles (31 degrees and...
Assessment of SLW-1 model in the presence of gray and non-gray particles
Özen, Guzide; ATEŞ, CİHAN; Selçuk, Nevin; Külah, Görkem (2019-02-01)
In this study, predictive accuracy of Gray Gas and SLW-1 approximations is benchmarked against Spectral Line-Based Weighted Sum of Grey Gases Model (SLW) in multidimensional enclosures involving gray/non-gray absorbing, em...
Effect of kaolin addition on alkali capture capability during combustion of olive residue
Batır, Özge; Selçuk, Nevin; Külah, Görkem (2019-01-02)
The effect of kaolin addition on the combustion characteristics of olive residue was investigated by thermogravimetric analysis (TGA) combined with Fourier-transform infrared (FTIR) spectrometer in parallel with ash charac...
Influence of gray particle assumption on the predictive accuracy of gas property approximations
Ates, CİHAN; Selçuk, Nevin; Külah, Görkem (2018-11-01)
In this study, influence of gray particle assumption on the predictive accuracy of gas property models is investigated for conditions typically encountered in industrial coal-fired furnaces. The aim is (i) to identify how ...
A new correlation for minimum spouting velocity for conical spouted beds operating with high density particles
GOLSHAN, Shahab; YAMAN, Onur; KÖKSAL, MURAT; Külah, Görkem; ZARGHAMI, Reza; MOSTOUFI, Navid (Elsevier BV, 2018-09-01)
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 ty...
Influence of fly ash composition on non-gray particle radiation in combusting systems
Ates, CİHAN; Selçuk, Nevin; Külah, Görkem (2018-08-01)
In this study, chemical composition dependency of both radiative properties of ash particles and radiative heat exchange are investigated for conditions typically encountered in industrial coal-fired furnaces. For that pur...