### 8.5.1. Basic Settings

#### 8.5.1.1. Particle Morphology Options

The morphology option can be set to `Particle Transport Fluid` or `Particle Transport Solid` in CFX-Pre. For details, see Basic Settings Tab in the CFX-Pre User's Guide. Gas and liquid particles should use the Fluid Particles option. Currently both models produce the same results because the same drag law is used for fluid and solid particles.

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