Particulate Fouling of Heat Transfer Surfaces: Mechanisms and Models

In the present context particulate fouling is defined as the accumulation of solid particles suspended in a fluid onto a heat transfer surface. Some of the mechanisms which occur are similar to those which govern the fouling of membranes or filters. Unlike filtration surfaces, however, heat transfer surfaces are more often parallel than perpendicular to the flow. Furthermore, the presence of temperature gradients near a heat transfer surface can perturb the isothermal fouling mechanisms as well as introduce additional particle transport mechanisms, thereby drastically modifying the rate and extent of fouling.

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