In summers i.e. now, my room has hot uncomfortable air in night,but outside air is cold 4-5 degrees Celsius colder than inside, my room has windows parallel to wind flow, so though wind flows in night it is parallel to my door. Keeping door open doesn't help either it does not replace warm air fast enough.
My assertion is that if I keep a table fan near door will it help drive cold air inside? How feasible is this solution? Does fluid dynamics provide solution?