[1] Nielsen [2]. Richardson [3] Baldock [4] 0.22 mm 0.32 mm Richardson Zaki. [5-6] mm [7] 1 mm. [8] [9] 5 mm 50 mm [10] [11] [12] -- 40% 50%

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1 ,2, , mm 2.0 mm d 10 = mm Richardson--Zaki,,, O359 A doi / EXPERIMENTAL STUDY OF FLUID-SOLID TWO-PHASE FLOW IN A VERTICAL TUBE 1 ZHANG Xuhui,2 KANG Huanlong LU Xiaobing WEI Wei Institute of Mechanics, Chinese Academy of Sciences, Beijing , China China University of Geosciences, Beijing , China Research Institute of Petroleum Exploration and Development, Langfang , Hebei, China Abstract This paper presents an experimental study of the solid-water two-phase flow with different solid grain size distributions and flow velocities. First, the controlling parameters are obtained through the dimensional analysis, then a two phase flow is created by using glass beads grain size: 0.25 mm 2.0 mm and sands d 10 = mm, respectively. The effects of the Reynolds number Re and the solid grain size are investigated. The results show that for the glass bead bed of mean grain sizes, the height of the bed in the tube increases linearly with the Reynolds number. For the sands of a wide particle gradation range, the small grains are flushed out of the tube and the residue mass decreases with the Reynolds number exponentially. The results might help the evaluation of the elevation of the soils containing the gas hydrate under the seafloor. Key words two-phase flow, grain size, Reynolds number, concentration , A zhangxuhui@imech.ac.cn,,. --, 2016, 382: Zhang Xuhui, Kang Huanlong, Lu Xiaobing, et al. Experimental study of fluid-solid two-phase flow in a vertical tube. Mechanics in Engineering, 2016, 382:

2 [1] Nielsen [2]. Richardson [3] Baldock [4] 0.22 mm 0.32 mm Richardson Zaki. [5-6] mm [7] 1 mm. [8] [9] 5 mm 50 mm [10] [11] [12] -- 40% 50% 1 m/s 2 m/s m 50.8 cm 63.5 cm 1 m 0 D H u h m C z. g ρ w ρ s ε 0 h = 4m 0. h ε 0 ρ s πd2 m C z h = f 1 m 0, ε 0, H, D,, u, g, ρ w, m = f 2 m 0, ε 0, H, D,, u, g, ρ w, C z = f 3 m 0, ε 0, H, D,, u, g, ρ w, 1 ρ w,, π 1 h h = f 1 D, ε 0, D H, ρ w u, ρ w 3/2 g 1/2 m m 0 = f 2 D, ε 0, D H, ρ w u, ρ w 3/2 g 1/2 C z = f 3 D, ε 0, D H, ρ w u, ρ w 3/2 g 1/2 2 ε 0, D H, ρ w 3/2 g 1/2 D ρ w u

3 h h = f m m 0 = f C z = f D, D D ρ w u, ρ w u ρ w u, 3 2, cm 3 cm 1 mm 10 cm. 2 1 kg 30 min mm, mm, mm, mm. G s % min ε s. Allen v t = d [ ] 4 ρ s ρ w 2 1/3 g ρ w 4 d 0.25 mm 3.0 mm Re 1 500

2 -- 147 a b 3 [13]. v/v t ε ε = 1 ε s 4 Richardson Zaki 4 / 5 30 min... m/m 0 = 1.

4 a b 3 [13]. v/v t ε ε = 1 ε s 4 Richardson Zaki 4 / 5 30 min... m/m 0 = 1.1 exp Re/ [4]. v/v t = ε n 5 n = lnv/v t / ln ε 6. n 4.57, 4.12, n. Re d/d. a 5

148 2016 38 Richardson--Zaki 4 b 5. -- D ρ w u --, 1. :, 1993 2 Nielsen P. Coastal Bottom Boundary Layers and Sediment Transport. Singapore: World Scientific, 1992 3 Richardson JF, Zaki WN.

5 Richardson--Zaki 4 b D ρ w u --, 1. :, Nielsen P. Coastal Bottom Boundary Layers and Sediment Transport. Singapore: World Scientific, Richardson JF, Zaki WN. Sedimentation and fluidisation: part 1. Transactions of the Institution of Chemical Engineers, 1954, 32: Baldock TE, Tomkins MR, Nielsen P, et al. Settling velocity of sediments at high concentrations. Coastal Engineering, 2004, 51: ,,.., 2006, 5: ,,.., 2007, 4: :, ,,.., 2002, 2: [ ]. :, [ ]. :, ,,.., 2014, 3224: ,,., 2006, 2: ,,.., 2010, 358: :..

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mm ~ 16 3 2011 6 Vol 16 No 3 JOURNAL OF HARBIN UNIVERSITY OF SCIENCE AND TECHNOLOGY Jun 2011 1 2 3 1 150040 2 150040 3 450052 1 3 4 > 1 ~ 3 > > U414 A 1007-2683 2011 03-0121- 06 Shrinkage Characteristics of