1. A computer-based method for analyzing airflow through a radiator of a vehicle, the method comprising the steps of: generating a plurality of pathlines, each pathline describing airflow of fluid moving through a vehicle front end and into the vehicle, each pathline including a position identifier and a velocity magnitude; calculating a plurality of intersection points, each intersection point identifying a pathline intersecting the radiator in the vehicle and a location on the radiator where the pathline intersects the radiator; generating one or more elements from the plurality of intersection points; calculating a flow rate associated with each element using the velocity magnitude included in the pathline identified the intersection points included in an element; generating a report describing a regional flow rate based on the flow rate associated with a plurality of elements; and storing the report in a computer readable storage medium.