3.1 Construction of computational domain and mesh for experiment-1

A 60-m long ventilation gallery was designed for simulations width and height of the gallery were 6 and 2.7 m. Man riding vehicle was designed and imported from the 3D CAD modeling. The overall dimensions of the man-riding were length 6.25 m, width 2 m and height 1.95 m. The location of the smoke pipe (DPM source) was just behind the left front wheel on the opposite side to the vehicle operator. The engine was equipped with a diesel particulate filter and the exhaust flow was a mixture of DPM and air. Figure 4 shows the details of the constructed CFD model.

Figure 5 shows the details of the surface mesh on the man riding vehicle (a) and man riding vehicle with gallery (b). To achieve accurate results, finer mesh was used with half-million computational cells. The minimum size of the cells was 7.3 <sup>10</sup><sup>3</sup> m, minimum edge length of cells was 0.025 m and size function was 'proximity and curvature'. The program-controlled 'inflation' feature was used with seven layers was used to generate finer cells in the boundary layers adjacent to solid boundaries.

Figure 5.

Mesh model of man riding vehicle and experimental gallery. (a) Surface mesh on man riding vehicle. (b) Mesh for airway.

Analysis of Diesel Particulate Matter Flow Patterns in Different Ventilation and Operational… DOI: http://dx.doi.org/10.5772/intechopen.84651
