Temperature distributions in a thin continuous casting mould model have been studied experimentally, using water as a working fluid. The mould model consists of two narrow walls and two broad walls. One of the broad walls of the mould model was cooled with cooling water of a fixed temperature. Inflow of two turbulent jets with a constant high temperature was from a bifurcated nozzle, submerged to a depth of 0.1 m below the air/water interface.

The temperature drop over the mould was measured as a function of the temperature difference between the liquid flowing into the mould and the cooling water temperature. From these measurements the overall heat transfer coefficient and heat transfer coefficient due to convection in the mould were calculated.

Temperature distributions at the cooled wall have been measured using thermochromic liquid crystal sheets, which have a specific color depending on the temperature. The shear layers of the two jets hit the cooled wall, leading to hot spot formation. The jets show a self-sustained oscillating behavior, leading to a non stationary temperature distribution at the cooled wall. Between the jets and the air/water interface, recirculation zones occur where the liquid cools down significantly, leading to large wall temperature differences in the mould.

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