English to Spanish Science Chemistry; Chem Sci/Eng

Hola a todos, mi consulta es sobre "sink down" en este contexto:

"The formation of water vapour in the charged material increases the gas pressure locally, in effect creating a pressure variation between the furnace space and the trough. As a result, formed water vapour will SINK DOWN through the charged material and condense in the heat exchanger, in turn lowering the pressure on the distant (in relation to the furnace space) side of the heat exchanger..."

Muchas gracias!!