## CFD ANALYSIS FOR DESIGN OPTIMIZATION OF REVERSE FLOW TYPE CYCLONE SEPARATOR: RESULTS AND DISCUSSIONS(1)

3.1. Steps followed during the 3.2. Geometric Details execution of project:

 Particulars Dimensions Inlet Width (m) 0.77 Inlet Height (m) 1.50 Exit Pipe Length (m) 1.81 Material Outlet Dia(m) 0.25 Gas Outlet Dia (m) 1.32 Cone Length (m) 2.09 Cylinder Length (m) 2.37

Table 1: Geometric Details of Cyclone Separator

Phase 1: (Initial Model)

3D Model generation as in figure 4 & 5, Mesh generation, Solution,

Post Processing

Phase 2: (Modified Model)

3D Model generation based on CFD results of Initial Model as in figure 8 & 9, Mesh generation,

Solution, Post Processing

Fig 4: Geometric Details of Cyclone Separator Half model is considered for analysis due to symmetry

Fig 5: Symmetric Model considered for analysis 3.3 Results of Initial Model

3.3.1 Pressure Contours of mixture at mid plane & top plane of cyclone (Pa)

From the figure 6 (left) at mid plane shows the variation of Pressure at mid plane and following readings are drawn

Pressure at the inlet in the initial model observed is -2670 Pa.

Pressure at the Outlet in the initial model observed is -5020 Pa.

Pressure drop in the initial model from inlet to Outlet is =-5020-(-2670)-= -2350 Pa Fig 6: Pressure Contours of mixture at mid plane & top plane of cyclone for Initial Model (Pa) Fig 7: Velocity Contours of mixture at mid plane & top plane of cyclone (m/s) for Initial Model

From the figure 6 (right) at top plane shows the variation of Pressure at different heights of the cyclone geometry.

Pressure at the inlet in the initial model observed is -2670 Pa

Pressure at the vertex finder in the initial model observed is -5810 Pa

Pressure drop from the inlet to vertex finder in initial model is -5810-(-2670) = -3140 Pa

3.3.2 Velocity Contours of mixture at mid plane of cyclone assembly (m/s)

From the figure 7 (left) at mid plane shows the variation of Velocities at mid plane and the following readings are drawn.

Velocity at the vertex finder in the initial model observed is 48.7 m/s

From the figure 7 (right) at top plane shows the variation of velocities at different heights of the cyclone geometry.

Velocity at the inlet in the initial model observed is 19.5 m/s

3.4 Results of Modified Model 3.4.1 Geometry Details of Modified Model Fig 8: Geometric Details of Cyclone    Fig 9: Symmetric Half

Separator-Modified Model Half model is Modified Model considered considered for analysis due to symmetry    for analysis

3.4.2. Pressure Contours of mixture at mid plane & top plane of cyclone (Pa)

From the figure 10 (left) at mid plane shows the variation of Pressure at mid plane and following readings are drawn

Pressure at the Inlet of the cyclone in the modified model is -2670 Pa.

Pressure at the Outlet of the cyclone in the modified model is -4460 Pa.

Pressure drop in the modified model from inlet to Outlet is -4460-(-2670) = -1790 Pa

From the figure 10 (right) at top plane shows the variation of Pressure at different heights of the cyclone geometry. Representative APR 391%. Average APR for this type of loans is 391%. Let's say you want to borrow \$100 for two week. Lender can charge you \$15 for borrowing \$100 for two weeks. You will need to return \$115 to the lender at the end of 2 weeks. The cost of the \$100 loan is a \$15 finance charge and an annual percentage rate of 391 percent. If you decide to roll over the loan for another two weeks, lender can charge you another \$15. If you roll-over the loan three times, the finance charge would climb to \$60 to borrow the \$100.

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