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  ____     __   __  __    __   _    _    _    _   
 |  _ \\   \ \\/ // \ \\ / // | || | || | || | || 
 | |_| ||   \ ` //   \ \/ //  | || | || | || | || 
 | .  //     | ||     \  //   | \\_/ || | \\_/ || 
 |_|\_\\     |_||      \//     \____//   \____//  
 `-` --`     `-`'       `       `---`     `---`

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Text this: A visual study of vortex rings fired transversely into a cross-flow