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        From the Initial Conditions section of the action bar, click Void Ratio  .Optional:  
  Enter a descriptive 
	 Name. 
   
				
					Select the geometry support in the model.
				
				
				A void ratio can be applied to one or more 3D bodies.
        
          
        Enter the Ratio.
        
      The value must be between zero and one.
				
					Click OK.
				
				
			
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