Measurement of Thermal Conductivities of Solid Particles in Packed Beds

Koya, Toshiyuki; Kunii, Daizo

doi:10.1252/kakoronbunshu1953.35.887

Cited by 5 publications

(3 citation statements)

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“…The effective thermal conductivity of packed beds filled with stagnant fluid has been correlated by Yagi and Kunii (1957), Kunii and Smith (1960) and Koya and Kunii (1972). Another correlation was proposed by Baskakov (Davidson and Harrison, 1971).…”

Section: Theorymentioning

confidence: 93%

Emulsion phase residence time and its use in heat transfer models in fluidized beds

Ozkaynak

Chen

1980

AIChE Journal

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= angular step size AT = time step size e A = thermal conductivity P = dynamic viscosity P = density 7 JI = stream fknction subrcripts i,k = mesh point coordinates 0 = initial condition 1 2 m Superscripts j , j + l / 2 , j+l correspond to time 7, (7 +,Adz), and (T + AT), = step size in radial direction = polar angle, spherical coordinate system = dimensionless time, T = a&z2 = refers to disperse phase (interior of the droplet) = refers to continuous phase (exterior of the droplet) = refers to large distance from the spherical particle * = asymptotic value (for T 4 00) = volume-or surface-averaged value respectively LITERATURE CITED Abramzon, B. M., V. Ya. Rivkind, and G.

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Section: Theorymentioning

confidence: 93%

Emulsion phase residence time and its use in heat transfer models in fluidized beds

Ozkaynak

Chen

1980

AIChE Journal

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“…Subsequently, researchers have carried out experiments exploring variation of void fraction near the packed bed container wall [2][3][4], variation of thermal conductivity due the effect of radiation [5,6], variation of transport properties within a bed under moving and stagnant fluid conditions [7], and so forth. Some of the studies are also being made with radial [8][9][10][11][12][13][14][15][16] and axial [1,[17][18][19][20][21][22][23][24] heating.…”

Section: Introductionmentioning

confidence: 99%

“…Tsotsas and Martin [25] classified the methods to determine thermal conductivity of packed beds as steady state and transient methods [8,10,13,16,26], radial and axial methods [8][9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24], and absolute and comparative methods [7,27]. In steady state methods, the required boundary conditions are imposed and temperature profile within the bed is allowed to come to the steady state.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Thermal Conductivity along the Radial Direction in a Vertical Cylindrical Packed Bed

Bedarkar¹,

Nurni

Ballal

2015

Journal of Powder Technology

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Heat transfer in packed beds and their thermal response have been of great interest for scientists and engineers for the last several years, since they play a crucial role in determining design and operation of reactors. Heat transfer of a packed bed is characterised through lumped parameter, namely, effective thermal conductivity. In the present studies, experiments were performed to investigate the thermal conductivity of a packed bed in radial direction. The packed bed was formed using iron ore particles. To determine the effective thermal conductivity a new transient methodology is proposed. The results obtained were compared with the models proposed by ZBS and Kunii and Smith.

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