Though it's probably not the largest sub-discipline, there are (and have been for some time: http://www.wiley.com/WileyCDA/WileyTitle/productCd-0631229191.html

Though it's probably not the largest sub-discipline, there are (and have been for some time: http://www.wiley.com/WileyCDA/WileyTitle/productCd-0631229191.html http://www.wiley.com/WileyCDA/WileyTitle/productCd-063122919...) a fair number of philosophers who are very interested in computing and (as you guessed) simulation as a way to approach their research questions.