In order to find the size and shape of particle detachments in the wire-arc spraying system, it is required to find the shear force on the electrodes (wire-tips). To solve the gas flow problem, the system was divided into two regions: (1) upstream and (2) downstream of the nozzle exit. In region 1, the axisymmetric turbulent gas flow is numerically solved and compared to its approximate analytical solution. In the second numerical region, which includes the tips of the two wires, shear force on the electrode surfaces is evaluated from the gas flow velocity profile adjacent to the electrodes. The gas flow in these regions is solved using the FLUENT software. Abstract only; no full-text paper available.

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