Question

give two conditions for siphoning

Answer 1

For a siphon to flow continuously, the height of the upper leg (h) must be less than atmospheric pressure and the outlet of the down leg (L2) must be below the surface of the upper reservoir (L1). The siphon conduit must also be completely full and free of air and liquid vapour.

Explanation:

Siphon coffee

While if both ends of a siphon are at atmospheric pressure, liquid flows from high to low, if the bottom end of a siphon is pressurized, liquid can flow from low to high. If pressure is removed from the bottom end, the liquid flow will reverse, illustrating that it is pressure driving the siphon.

Answer 2

Answer:

For a siphon to flow continuously, the height of the upper leg (h) must be less than atmospheric pressure and the outlet of the down leg (L2) must be below the surface of the upper reservoir (L1). The siphon conduit must also be completely full and free of air and liquid vapor.