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use Simulate Air Effects

when realistic mist is needed in waterfall setups, or stormy ocean scenes. The air simulation can dramatically increase the quality of splash and mist effects.

– When enabled, moving the Simulator's object over a series of frames causes inertial forces in the opposite direction of the movement.

This allows you to link the Simulator to a moving object and keep the size of the grid relatively small, as opposed to creating a large grid that covers the entire path of the moving object.

Motion Inertia

can be used for moving ground and water vehicles, torches, fireballs, rockets, etc.

When this option is used together with the Initial Fill Up option and Open Container Wall conditions, a simulation of moving an object over a sea surface can be done. For more information, see the Motion Inertia example below.

Gravity | grav, gmul

– Phoenix Gravity

 makes the liquids fall down and makes fire rise up.

 The Gravity

 option is a multiplier, so using the default 1.0 will make it behave like real world gravity, setting it to 0.0 will disable its effect completely, and you can also use negative values, which will inverse the gravity effect.

 – When enabled, the container is filled up with liquid when the simulation starts. This option determines the fill-up level, measured in % of the vertical Z size of the Grid. For liquid simulations

using Confine Geometry, you can

enable Clear Inside

 on the geometry and liquid will not be created at simulation startup in the voxels inside the geometry.

Ocean | oceanfill – Changes the Open Container Walls of the Simulator so they would act like there is an infinite liquid volume beyond them. Pressure will be created at the Simulator's walls in order to support the liquid, and if the surface of a wall below

the Initial Fill Up

 level, or the bottom, gets cleared from liquid during simulation, new incoming liquid would be created. You can also animate the Simulator's movement or link it to a moving geometry, and it would act like a moving window over an ocean that stays in place. This way you can simulate moving ships or boats that carry their Liquid Simulator along with them as they sail into an ocean, so you don't need to create one huge long Simulator along their entire path.

In order to eliminate air pockets between Solid geometry and the liquid mesh, this option will automatically set all Solid voxels below the Initial Fill Up level to contain Liquid amount of 1, even if they don't contain any Liquid particles. If you don't want this effect,

enable Clear Inside

 from the Chaos Phoenix Per-Node Properties of the Solid geometry. See the Fill Up For Ocean and Clear Inside example below.

 – Determines how many calculations

the simulation will perform between two consecutive frames of the timeline.

For more information, see the Steps Per Frame example below.

Phoenix Mapper. If a Phoenix Liquid Source does not have RGB enabled, it also emits using the Default RGB value.

RGB Diffusion | rgbdiff – Control how quickly the colors of particles are mixed over time during the simulation. When it's set to 0, each FLIP liquid particle carries its own color, and the color of each individual particle does not change when liquids are mixed. This means that if red and green liquids are mixed, a dotted red-green liquid will be produced instead of a yellow liquid. This parameter allows the colors of particles to change when the particles are in contact, thus achieving uniform color in the resulting mixed liquid. For more information, see the RGB Diffusion example below.

Viscosity Diffusion | viscdiff -  Phoenix supports sourcing of fluids with different viscosity (thickness) values. This parameter specifies how quickly they blend together. A low value will preserve the distinct viscosities, while a high value will allow them to mix together and produce a fluid with a uniform thickness.

Non-Newtonian |  nonnewt – Modifies the viscosity with respect to the liquid's velocity to overcome the conflict between viscosity and wetting, where a high viscosity of real liquids prevents wetting. Non-Newtonian liquids are liquids that behave differently at different velocities. This parameter accounts for this behavior by decreasing the viscosity in areas where the liquid is moving slowly and retains a higher viscosity where the liquid is moving quickly. For example, to cover a cookie with liquid chocolate, high viscosity is needed in the pouring portion of the motion to obtain the curly shape of the chocolate as it lands on the cookie and begins to settle down. On the other hand, a smooth chocolate is needed to settle in over the cookie without roughness and holes. If the viscosity is high enough, the chocolate might look right during the pouring and settling motions but won't settle in to form a smooth thin layer over the cookie. This parameter decreases the viscosity where the liquid is moving slowly (over the surface of the cookie) while keeping the faster-moving stream tight and highly viscous. For more information, see the Non-Newtonian example below.

Droplets Surfing | dsurf – This parameter affects the liquid and the splash particles, controlling how long a particle hovers on the surface before it merges with the liquid. The parameter is used mostly in ocean/wave simulations. For more information, see the Droplets Surfing example below.

Strength | lqsurft

 – Controls the force produced by the curvature of the liquid surface. This parameter plays an important role in small-scale liquid simulations because an accurate simulation of surface tension indicates the small scale to the audience. Lower Strength values will cause the liquid to easily break apart into individual liquid particles, while higher values will make it harder for the liquid surface to split and will hold the liquid particles together. With

high Strength, when an external force affects the liquid, it would either stretch out into tendrils, or split into large droplets. Which of these two effects will occur is controlled by the Droplet

Formation parameter. For more information, see

the Surface Tension example

 below.

Droplet

Formation | lqstdropbreak

 – Balances between the liquid forming tendrils or droplets. When set to a value of 0, the liquid forms long tendrils. When set to a value of 1, the liquid breaks up into separate droplets, the size of which can be controlled by the Droplet Radius

 parameter. For more information, see the Droplet

Formation example below.

Droplet Radius | lqstdroprad

 – Controls the radius of the droplets formed by the Droplet

Formation parameter, in voxels. This means that increasing the resolution of the Simulator will reduce the overall size of the droplets in your simulation.

WetMap particle. The main purpose of this parameter is to prevent long visible tracks from being left by a single liquid particle. For more information, see the Consumed Liquid example below.

Drying Time (sec) | drying

 – Controls the drying speed in seconds. The WetMap particles are born with a size of 1, and if they are in an air environment, the size decreases until it reaches zero after the time specified with this parameter.

Sticky Liquid | wetdyn

 – This option produces a connecting force between the WetMap particles at the geometry surface and nearby liquid particles

. For more information, see the Sticky

 Liquid example

 below.

the Interpol.Step

 parameter - this will essentially re-project the UVWs to avoid stretching but cause the textures assigned to the fluid to 'pop' as the re-projection is applied. If you intend to apply e.g. a displacement map to a flowing river, set this parameter to a value between 0.1 and 0.3 - this will suppress both the effects of stretching and popping. See

the Interpolation example

 below.

Interpol. Step | texuvw_interpol_step – Specifies the update frequency for the UVW coordinates. When set to 1, the UVWs are updated on every frame, taking into account

the Interpolation

 parameter. See

the Interpolation Step

 example below.