| Description | Type | Default | 
|---|---|---|
|  
				   Angular tolerance for excluding adjacent grid point surfaces in the fluid mass matrix. An average element surface normal is calculated for all wet surface elements connected at a grid point. If the angular difference between the average element surface normal and an adjacent individual element normal is greater than VFMNORNTOL, its fluid mass is excluded.  | 
 
				   Real  | 
 
				   30.0  |