If your model is at say, 60% scale, your Reynolds number will be different(smaller) than the 100% scale model, and it is this difference in Re# that is the source of MANY correlation issues.
Reynolds number is lower, the lower the flow speed and the smaller the object, it is higher when the object is both larger and the flow speed is higher.
Room temperature honey dripping off a spoon has an extremely low Reynolds number, a 747 wing at cruising speed has a huge Reynolds number. The number gives a rough idea how turbulent the flow will tend to be. A 747 wing is almost entirely turbulent flow at cruising speeds.
If your model is at say, 60% scale, your Reynolds number will be different(smaller) than the 100% scale model, and it is this difference in Re# that is the source of MANY correlation issues.
Reynolds number is lower, the lower the flow speed and the smaller the object, it is higher when the object is both larger and the flow speed is higher.
Room temperature honey dripping off a spoon has an extremely low Reynolds number, a 747 wing at cruising speed has a huge Reynolds number. The number gives a rough idea how turbulent the flow will tend to be. A 747 wing is almost entirely turbulent flow at cruising speeds.
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