Aerosol particles suspended in hot fluids tend to deposit on the cold walls of piping in chemical plants, so that it is important to estimate the degree of scaling or fouling caused by the deposition of aerosol particles. The study was undertaken to obtain information on the thermophoretic deposition of aerosol particles In a heat-exchanger pipe. The experiments were made to determine the deposition of aerosol on the pipe walls of a heat exchanger in a temperature gradient along its length, as a function of velocity range from laminar to turbulent. The degree of thermophoretic deposition of aerosol agrees relatively well with Its analysis, connecting thermal repulsive force acting on particles with parameters of the heat exchanger, such as mean temperature difference, velocity, and temperature gradient between hot fluid and coolant.

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