Immiscible Fluid Mixture

Use the Immiscible Fluid Mixture modeling object to model an immiscible fluid mixture with a clear interface between the fluids. You specify a tracked fluid material and a complementary fluid material.

Both the tracked fluid and the complementary fluid can be either a gas or a liquid. Gases and liquids are materials for which the Type option is set to Fluid. The flow solver differentiates between a gas and a liquid as follows:

• When the gas constant, Rs, is defined, the fluid material is a gas.

• When the gas constant, Rs, is not defined, the fluid material is a liquid.

You must define one Immiscible Fluid Mixture modeling object per two-phase, immiscible fluid enclosure. You can define an Immiscible Fluid Mixture modeling object in the 3D mesh collector which contains meshes for both the tracked fluid and complementary fluid regions.

You can also specify a surface tension coefficient between the tracked fluid and the complementary fluid.

When you post process the results, a volume fraction value close to one indicates that the mixture is mostly composed of the tracked fluid whereas a value close to zero indicates that the mixture is mostly composed of the complementary fluid.

Where do I find it?

Application	Pre/Post
Command Finder	Modeling Objects
Location in dialog box	Immiscible Fluid Mixture→Create

How do I

Define a gas using the Redlich-Kwong equation of state

Define a bivariate fluid material property

Define a bivariate fluid material property using a generic entity (legacy)

Model a homogeneous gas mixture

Define a Non-Newtonian Fluid

Model a tracer fluid

Model water sloshing in a bottle

Learn more

Fluid material conversion

Bivariate fluid material properties

Homogeneous Gas Mixture

Non-Newtonian Fluid

Tracer Fluid

Simulating two-phase, immiscible fluids

Look up more details

Fluid materialsfor heat transfer and flow analyses

Modeling multiple fluids

Multiple Fluid materials

CSV file format for bivariate fluid material properties (legacy)

Quick links

Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal

Simcenter 3D Thermal/Flow, Electronic Systems Cooling, and Space Systems Thermal boundary conditions

Command reference

Pre/Post video examples

Bulk Entry Descriptions

Simcenter 3D tutorials

Browse Simcenter 3D help by product area

Immiscible Fluid Mixture, Simcenter 3D 2021.1 Series

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