Acronym for Multiple Reference Frame This is a steady state CFD method that simplifies the flow effects of a transient moving body with a fixed shape in a computer simulation. It is very commonly used for modeling impellers in mixing tanks and rotor/stator turbomachinery interactions for instance.
"Medium Range Forecast" model generated at the National Centers for Environmental Prediction ( NCEP). No longer called the MRF but rather GFS (Global Forecasting System).
(Medium Range Forecast) -- A medium range computer weather prediction model run once a day in Washington, DC and used by meteorologists to forecast the weather.