Clarke hit four 3-pointers and Dunham had three for the Bulldogs (6-2), who never trailed, opened the game on a 35-8 run and led by as many as 37 in the second half. Andrew Smith added 11 points, Erik Fromm and Khyle Marshall had 10 apiece, and every player on Butler's roster saw at least 4 minutes of action.
The Bulldogs shot 56 percent from the floor and made 11 of their 21 3-point attempts. They also turned 19 IUPUI turnovers into 22 points.
Butler improved to 73-11 in Hinkle Fieldhouse under coach Brad Stevens.
Mike Brey is looking at former Notre Dame players to fill two assistant jobs that have opened up with the departures of Martin Ingelsby and Anthony Solomon.
Purdue's 2016-17 prospects got a jolt Wednesday when forward Caleb Swanigan announced he will return for his sophomore season.
Clemson's Jaron Blossomgame says he is withdrawing from the NBA draft and returning to school for a final season.