We report the results of laboratory experiments on water heating/cooling, performed in 5 m long water channel with a slope.
About 63 series of photos were analyzed: for 3 locations, for 3 bottom slopes (3.7, 6.7 and 12 degrees) and for different
Ra numbers. It was pointed out that there exist two types of mixing characterizing different circulations in the presence of
slope: gravity current and ... [Show full abstract] undersurface jet; the thermal bar is the region where one type of mixing is replaced by another;
the highest speed and flowrate are at the break point; the flow is three-dimensional.