Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Liquid Holdup and Electric Resistivity in an Irrigated Packed Bed
Mingkai NIUTomohiro AKIYAMAReijiro TAKAHASHIJun-ichiro YAGI
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1996 Volume 82 Issue 9 Pages 737-742


Liquid holdup and electric resistivity in an irrigated packed bed for scrap melting with a high-frequency induction furnace was examined by using model experiments. In the measurement of liquid holdups, the contact angle between liquid and particles in the packed bed was controlled above 90°, and the inner wall of the packed bed was lined with a sheet of regularly arranged hemispherical convexity for eliminating wall effect. In the measurement of electric resistivity, molten wood's metal was irrigated to packed beds of graphite or iron particles. As the results, two empirical formulate were obtained as follows;
For static and dynamic holdups
εl, s=0.181Cpm-0.458Gam-0.0218, εl, d=1.58×105Rem0.268Cpm-2.16Gam-0.526
For electric resistivity
ρe=1.92[1/3(εssll)+2/3 1/εsρslρl]-0.819[Nεs/dp/Lexp(εs-1/εl)]-0.243

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