![]() Please enter a value to stop emission at a certain amount of particles. Therefore it is possible to enable and disable this property on demand. Vorticity hardly contributes to a fluid simulation, but can be very important for the render process. A poor conductor shows low conductivity and is called an insulator. Good thermal conductors are generally materials with many free electrons, for example metals. “Resolution†has a strong impact on this parameter. With very low settings (0.2 - 1.5) the gas can be compressed effectively and with “Int | Ext Pressure†set to 1.0 you will see a natural diffusion. ![]() A warmer environment will heat the fluid and accelerate the particles. If this value is lower than "Temperature", the particles will cool down. This is the temperature of the fluid's surrounding environment. The Kelvin scale is based on absolute zero point at roughly -273 Â☌, which represents 0 K a temperature of 0 Â☌ is 274 K. In RealFlow, temperature is measured in Kelvin. Very hot gases have a very strong tendency to expand and they raise quickly. Here, the fluid's temperature is adjusted. High settings (40-50 and higher) can lead to misbehaving particles. The default value of 3.0 describes the viscosity of water. Fluids with low viscosity are alcohol, many solvents or liquid gases. Substances with very high viscosity are honey, tar or syrup, for example. With “Gas†particles you normally define very low “Int Pressure†and rather high “Ext Pressure†values to prevent the particles from flying away. €œExt Pressure tries to limit a fluid’s expansion tendency and can be compared to atmospheric pressure. If “Int Pressure†and “Ext Pressure†are set to 0.0 the particles lose their fluid behaviour and they behave like “Dumb†particles. €œInt Pressure†simulates the forces between nearby particles and pushes them apart - this makes the fluid fill a greater volume.  Avoid very small values close to 0, because they can lead to instabilities. With single emitters, changes have no effect. “Density†is only relevant for interacting fluids with different properties, e.g. This parameter is defined as mass per volume unit and is different for each substance. There is also a relation between “Resolution†and a particle’s radius: radius = 1.0 / (1000.0 Â.You can monitor the relationship between mass and density under Statistics > Particle mass. With “Resolution†set to 1.0, a volume of 1 m x 1 m x 1 m filled with 1,000 particles has a mass of exactly 1,000 kg.With this setting you can change the amount of particles, “Resolution†mainly depends on scene scale and emitter scale, but it also affects the fluid’s mass and therefore depends on “Densityâ€, too. → “ Script†lets you write your own fluid behaviour with Python scripting.→ “ Elastics†can be used for effects like jelly-like fluids or expanding an contracting substances.These particles cannot react with each other and will not be affected by other emitters. ![]() → “ Dumb†particles are often used for spray or foam.→ “ Liquid†is RealFlow’s standard setting and provides parameters for all watery or high-viscous substances.→ “Gas†particles are used to simulate fluids like air. ![]() This menu allows you to define the fluid’s behaviour: The fluid's temperature plays an important role: high values increase the motion of the particles and lead to stronger expansion cool gases fill a smaller volume. With this fluid type it is not possible to achieve the typical behaviour of swirling smoke clouds or fire.
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