Hydrodynamic Characteristics of Dense Conical Fluidized Bed: CFD Simulation and Experimental Verification

Abstract

<span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><span style="font-size: 7pt; color: #000000; font-style: normal; font-variant: normal;"><span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em><span style="font-size: 10pt; color: #000000; font-variant: normal;"><span style="font-size: 10pt; color: #000000; font-variant: normal;"><span style="font-size: 10pt; color: #000000; font-variant: normal;"><span style="font-size: 10pt; color: #000000; font-variant: normal;"><span style="font-size: 10pt; color: #000000; font-variant: normal;"><span style="font-family: TimesNewRomanItalic; font-size: 10pt; color: #000000; font-variant: normal;"><span style="font-size: 10pt; color: #000000; font-variant: normal;"><span style="font-size: 10pt; color: #000000; font-variant: normal;">> <span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>The hydrodynamic characteristics of dense conical fluidized bed were investigated</em> <span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>experimentally and numerically. Experimental studies have been carried out in a bed</em> <span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>containing TiO</em><span style="font-size: 7pt; color: #000000; font-style: normal; font-variant: normal;"><em>2 </em><span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>particles belonging to A/C boundary of Geldart's classification with a</em> <span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>wide particle size distribution. Pressure measurements and an optical fiber technique</em> <span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>allowed determining the effect ofhigh bed particles loading on the minimum fluidization</em> <span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>velocity, local solid volume fraction and solid velocity. Two-fluid model approach with</em> <span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>three different drag models and boundary conditions (BCs) consisting ofno-slip, partialslip and free-slip BC is presented for the numerical predictions. In this paper, we show</em> <span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>the Gidaspow drag function with k-</em><span style="font-family: TimesNewRomanItalic; font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;">Â turbulent model by applying the partial<span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>-slip BC can</em> <span style="font-size: 10pt; color: #000000; font-style: normal; font-variant: normal;"><em>improve the numerical results at high particle loading.</em></span></span></span></span></span></span></span></span><br style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" /></span></span></span></span></span></span></span></span></span></span></span></span></span></em><br style="font-style: normal; font-variant: normal; font-weight: normal; letter-spacing: normal; line-height: normal; orphans: 2; text-align: -webkit-auto; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-size-adjust: auto; -webkit-text-stroke-width: 0px;" /></span></span></span></span></span>