Fluid Effects > Add/Edit Contents > With Curve >
Sets the number of samples that are calculated along the curve. For example, if you set the number of curve samples to 1, only one fluid sample on one voxel is generated. For best results, set the number of samples to a number that is greater than the number of voxels you want to affect. The maximum number of samples is 1000.
Sets the velocity of the fluid contents inserted along the curve to the value specified in the Velocity field. When this attribute is on, the velocity’s magnitude decreases at high curvature points along the curve and increases at low curvature points. When this attribute is off, the velocity is stabilized at the specified velocity value and the velocity draw arrows all appear the same length. Curvature-Based Velocity is off by default.