Abstract
A study is made of the aspiration of small airborne dust particles into a bulky sampling head. The governing equations are solved using the Linear Boundary Integral Equation (L.B.I.E.) Method which involves an approximation of Green's Integral Formula. Results are obtained for two-dimensional cylindrical and rectangular samplers with the inlet facing the oncoming fluid. It is demonstrated that the finite size of the inlet and the shape of the sampler are very important to the fluid mechanics in the vicinity of the orifice and so it is essential that accurate flow calculations are obtained in this region. The numerical results obtained are shown to agree well with previous experimental and theoretical results but the L.B.I.E. method has many advantages over these methods in that it can easily be extended to more complex sampler shapes and to arbitrary sampling positions.
Published Version
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