The contribution of differently-sized ash particles to the fouling trends of a pilot-scale coal-fired combustor with an ash deposition CFD model
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A CFD model for ash fouling with a newer drag law for fine particles is presented.

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A whole heat exchanger is modeled with ash particles ranging from 0.015 μm to 15 μm.

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The gas velocity seemed more important for the deposition than the tube deposits.

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The behavior of particles below 4 μm seemed to be identical for each studied case.

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This suggests a limiting particle diameter for the inertial impaction.

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