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             ___                 ___     _____    
    ___     / _ \\    ____      / _ \\  |  __ \\  
   /   ||  | / \ ||  |    \\   / //\ \\ | |  \ || 
  | [] ||  | \_/ ||  | [] ||  |  ___  ||| |__/ || 
   \__ ||   \___//   |  __//  |_||  |_|||_____//  
    -|_||   `---`    |_|`-`   `-`   `-`  -----`   
     `-`             `-`

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Text this: Flow field analysis of columnar vortex