Numerical computation of a circulating fluidized bed combustor

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International Journal of Thermal Sciences

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2008

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…However, most of the models in the literature do not completely take account of the performance of the bottom zone, consider the bottom zone as well-mixed distributed flow with constant voidage, and use generally lumped formulation [1][2][3][4][5][6][7][8][9][10][11][12][13]. In the present study, bottom zone is modeled as two-phase flow which is subdivided into a solid-free bubble phase and a solid-laden emulsion phase [40,47]. The bubble rise velocity, the bubble size, the bubble volume fraction and the suspension porosity is calculated by Horio [48].…”

Section: Hydrodynamics Structurementioning

confidence: 99%

Two-dimensional coal combustion modeling of CFB

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International Journal of Thermal Sciences

²

2008

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…In the modeling, the CFB riser is analyzed in two regions: the bottom zone in turbulent fluidization regime is modeled in detail as two-phase flow which is subdivided into a solid-free bubble phase and a solid-laden emulsion phase (Gungor and Eskin, 2007a;Gungor, 2008;Huilin et al, 1998). The bubble rise velocity, the bubble size, the bubble volume fraction and the suspension porosity is calculated by Horio (1992).…”

Section: Hydrodynamics Structurementioning

confidence: 99%

Effects of operational parameters on emission performance and combustion efficiency in small-scale CFBCs

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Journal of the Chinese Institute of Chemical Engineers

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2008

Exaggerated anticipatory anxiety is common in social anxiety disorder (SAD). Neuroimaging studies have revealed altered neural activity in response to social stimuli in SAD, but fewer studies have examined neural activity during anticipation of feared social stimuli in SAD. The current study examined the time course and magnitude of activity in threat processing brain regions during speech anticipation in socially anxious individuals and healthy controls (HC). Method Participants (SAD n = 58; HC n = 16) underwent functional magnetic resonance imaging (fMRI) during which they completed a 90s control anticipation task and 90s speech anticipation task.

“…In the literature, both Leckner et al [31] and Huilin et al [36] claim that this zone could be explained by the presence of bubble-like voids that characterizes the gas flow. Werther and Wein [30] described the expansion behavior of the turbulent CFB bottom zone by a model that is based on modified equations which were originally developed for conventional bubbling fluidized beds.…”

Section: Bottom Zone (Dense Bed)mentioning

confidence: 99%

Analysis of environmental benefits of CFB combustors via one-dimensional model

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Chemical Engineering Journal

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2007