The two nations face off in Belo Horizonte tomorrow night with a place in Sunday's final at stake.
While admitting that Germany are a "great team" under coach Joachim Low, Luiz expects Brazil to play their part in a thrilling last-four encounter.
"They are a great team with a great philosophy of how to play football," he told FIFA.com. "They have a lot of great players, a great coach and it will be a great game. It is a World Cup semi-final."
Luiz has scored two goals in five games for Brazil so far at the World Cup.