Liquid holdup and electric resistivity in an irrigated packed bed

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 degree , 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 epsilon sub(l,s) identical with 0.181Cp super(-) sub(m) super(0.458)Ga super(-) sub(m) super(0.0218), epsilon sub(l,d) identical with 1.58x10 super(5)Re super(0) sub(m) super(.268) Cp super(-) sub(m) super(2.16)Ga super(-) sub(m) super(0.526) For electric resistivity rho sub(e) identical with 1.92[1/3( epsilon sub(s)/ rho sub(s) + epsilon sub(l)/ rho sub(l))+2/3 1/ epsilon sub(s) rho sub(s)+ epsilon sub(l) rho sub(l)] super(-0.819) [N epsilon sub(s)/d sub(p)/L exp( epsilon sub(s)-1/ epsilon sub(l))] super(-0.243).