Method for propagating vibration into a conductive fluid and method for solidifying a melted metal using the same propagating method of vibration

Abstract

A given magnetic field and a given wave are applied to a conductive fluid so as to satisfy the relations of: l ⊥ >δ  ( 1 ) λ″>λ  ( 2 ) on condition that a length of said conductive fluid is set to l ⊥ (m), and the equations of δ=(2/Pμω) 1/2 and λ″=2πB/ω(ρμ) 1/2 are defined (σ: the electric conductivity (S/m) of said conductive fluid, ρ: the density (kg/m 3 ) of said conductive fluid, μ: the permeability of said conductive fluid, B: the strength of said magnetic field (T), ω: the angular frequency of said wave), thereby to generate and propagate a given vibration into said conductive fluid.

What is claimed is:  
     
         1 . A method for propagating vibration into a conductive fluid, comprising the steps of: 
 preparing a given conductive fluid, and    applying a given magnetic field and a given wave to said conductive fluid so as to satisfy the relations of:     l   ⊥ >δ  (1)λ″>λ  (2)   on condition that a length of said conductive fluid is set to l ⊥ (m), and the equations of δ=(2/ρμω) 1/2  and λ″=2πB/ω(ρμ) 1/2  are defined (σ: the electric conductivity (S/m) of said conductive fluid, ρ: the density (kg/m 3 ) of said conductive fluid, μ: the permeability of said conductive fluid, B: the strength of said magnetic field (T), ω: the angular frequency of said wave), thereby to generate and propagate a given vibration into said conductive fluid.    
     
     
         2 . The propagating method as defined in  claim 1 , wherein said magnetic field and said wave are applied to said conductive fluid so as to satisfy the relation of: 
         l   ⊥ >λ″  (3) 
     
     
         3 . The propagating method as defined in  claim 1 , wherein said wave to be applied to said conductive fluid includes an AC electric field from an external AC power supply.  
     
     
         4 . The propagating method as defined in  claim 1 , wherein a given disturbance of magnetic field is generated due to said magnetic field to be applied and propagated in convection in said conductive fluid.  
     
     
         5 . The propagating method as defined in  claim 1 , wherein an Alfven wave is generated and propagated in said conductive fluid.  
     
     
         6 . A method for solidifying a melted metal, comprising the steps of: 
 preparing a melted metal, and    applying a given magnetic field and a given wave to said melted metal so as to satisfy the relations of:     l   ⊥ >δ  (1)λ″>λ  (2)   on condition that a length of said melted metal is set to l ⊥ (m), and the equations of δ=(2/ρμω) 1/2  and λ″=2πB/ω(ρμ) 1/2  are defined (σ: the electric conductivity (S/m) of said melted metal, ρ: the density (kg/m 3 ) of said melted metal, μ: the permeability of said melted metal, B: the strength of said magnetic field (T), ω: the angular frequency of said wave), thereby to generate and propagate a given vibration into said melted metal.    
     
     
         7 . The solidifying method as defined in  claim 6 , wherein said magnetic field and said wave are applied to said melted metal so as to satisfy the relation of: 
         l   ⊥ >λ″  (3)  
     
     
         8 . The solidifying method as defined in  claim 6 , wherein said wave to be applied to said melted metal includes an AC electric field from an external AC power supply.  
     
     
         9 . The solidifying method as defined in  claim 6 , wherein a given disturbance of magnetic field is generated due to said magnetic field to be applied and propagated in convection in said melted metal.  
     
     
         10 . The solidifying method as defined in  claim 6 , wherein an Alfven wave is generated and propagated in said melted metal.