Results 211 to 220 of about 98,469 (255)
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2000
From the various types of bioreactors discussed in the literature, only a few are actually used in industry. By far the majority of processes are performed in stirred tank bioreactors. Besides these standard reactors, only bubble columns or, more generally, airlift reactors reached a noticeable number of applications.
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From the various types of bioreactors discussed in the literature, only a few are actually used in industry. By far the majority of processes are performed in stirred tank bioreactors. Besides these standard reactors, only bubble columns or, more generally, airlift reactors reached a noticeable number of applications.
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Dynamic simulation of bubbly flow in bubble columns
Chemical Engineering Science, 1999Gas–liquid bubbly flow in two-dimensional bubble columns is studied by numerical simulation. An Eulerian–Eulerian two-fluid model is used to describe the time-dependent motion of the liquid driven by small, spherical gas bubbles injected at the bottom of the columns.
Y. Pan, M.P. Dudukovic, M. Chang
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Bubble Size Distribution in Oil‐Based Bubble Columns
Chemical Engineering & Technology, 2008AbstractA practical population balance model was used to evaluate the bubble size distribution in a bubble column. In addition, the bubble size distribution in the bubble column was measured at different gas velocities by photography and analysis of the pictures.
S.‐S. Homayouni +4 more
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Bubble behaviour and flow structure of bubble columns
Chemical Engineering and Processing: Process Intensification, 1991Abstract Numerous experimental results concerning the flow structure in bubble columns are presented, including axial and radial components of the bubble velocity, axial components of the liquid velocity and its fluctuations as well as the radial distribution of the gas hold-up.
B.P. Yao +3 more
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2008
In this chapter the elementary hydrodynamic characteristics of simple bubble columns are summarized. Different designs of bubble columns are sketched, and examples of their industrial applications are outlined. An overview of the status on Eulerian bubble column modeling is presented.
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In this chapter the elementary hydrodynamic characteristics of simple bubble columns are summarized. Different designs of bubble columns are sketched, and examples of their industrial applications are outlined. An overview of the status on Eulerian bubble column modeling is presented.
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Mixing in mechanically agitated gas-liquid contactors, bubble columns and modified bubble columns
Chemical Engineering Science, 1983Abstract Mixing time measurements were made in 300 and 1000 mm i.d. mechanically agitated contactors with different types of impellers, located at different heights from the bottom of the vessel. Mixing time measurements were also made in 150, 200, 385 and 1000 mm i.d. bubble columns with varying liquid heights.
A.B. Pandit, J.B. Joshi
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Industrial & Engineering Chemistry Research, 2019
Using a hexapod ship motion emulator, the influence of floating vessel motion on the trajectory and velocity profile of single ellipsoidal bubbles is investigated from the images provided by a high...
Carsten Drechsler +4 more
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Using a hexapod ship motion emulator, the influence of floating vessel motion on the trajectory and velocity profile of single ellipsoidal bubbles is investigated from the images provided by a high...
Carsten Drechsler +4 more
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KAGAKU KOGAKU RONBUNSHU, 2001
ドラフトチューブ付気泡塔の流動特性について装置因子の観点から，とくにドラフトチューブ長さ，上下の隙間の長さ等の影響を検討した．液混合時間に及ぼす塔のアスペクト比（塔高/塔径）の影響および液循環流量に及ぼすドラフトチューブ上端から通気時の液面までの距離の影響を明確にした．また，気液の循環流量の関係を示した．次に，ドラフトチューブを改良した研究を紹介した．多孔ドラフトチューブを挿入した気泡塔では，特異な流動挙動により，気液物質移動および液混合性能が大きく改善されることを示した．また，充填物・向流式気泡塔と多孔ドラフトチューブとの組合せ等の一連の研究および高粘性液における性能改善や排水処理への応用研究の結果を示し，考察を加えた．さらに ...
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ドラフトチューブ付気泡塔の流動特性について装置因子の観点から，とくにドラフトチューブ長さ，上下の隙間の長さ等の影響を検討した．液混合時間に及ぼす塔のアスペクト比（塔高/塔径）の影響および液循環流量に及ぼすドラフトチューブ上端から通気時の液面までの距離の影響を明確にした．また，気液の循環流量の関係を示した．次に，ドラフトチューブを改良した研究を紹介した．多孔ドラフトチューブを挿入した気泡塔では，特異な流動挙動により，気液物質移動および液混合性能が大きく改善されることを示した．また，充填物・向流式気泡塔と多孔ドラフトチューブとの組合せ等の一連の研究および高粘性液における性能改善や排水処理への応用研究の結果を示し，考察を加えた．さらに ...
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European Journal of Applied Microbiology and Biotechnology, 1979
R. Buchholz, K. Sch�gerl
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R. Buchholz, K. Sch�gerl
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