How to Draw Melting Icicles

V, 15 bytes

Àévò^lYp2x>òÀñd

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Fairly straightforward.

À               " Arg1 times:
 év             "   Insert a 'v'
   ò       ò    " Recursively:
    ^l          "   Break if there is only one character on this line
      Y         "   Yank this line
       p        "   Paste it below us
        2x      "   Delete two characters
          >     "   Indent this line
            À   " Arg2 times:
             ñd "   Delete a line

05AB1E, 12 bytes

Code:

ÅÉ'v×R²F¨}.c

Explanation:

ÅÉ             # List of uneven numbers: [1, 3, 5, ..., input]
  'v×          # String multiply by 'v', giving ['v', 'vvv', 'vvvvv', ...]
     R         # Reverse the array
      ²F }     # Second input times, do...
        ¨      #   Remove the first element of the array
          .c   # Centralize the array

Uses the CP-1252 encoding. Try it online!

05AB1E, 11 bytes

;-Ý·¹+'v×.c

;-          Compute x = Input[1]-Input[0]/2  (e.g. 7,2 -> -1.5)
  Ý         Push [0, ..., x]                 (e.g. 7,2 -> [0, -1])
   ·        Multiply each value by 2         (e.g. 7,2 -> [0, -2])
    ¹+      Add Input[0] to each value       (e.g. 7,2 -> [7, 5])
      'v×   String multiply by 'v'
         .c Center all strings and implicitly display them  

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