This article provides more information related to the different types of fluid mixtures that can be created in Flownex and provides the necessary steps to create a mixed fluid. |
DIFFERENT TYPES OF FLUID MIXTURES THAT CAN BE CREATED IN FLOWNEX
Flownex allows users to create custom fluid mixtures.
These mixtures include:
- Gas Mixtures
- Liquid Mixtures
- Two-Phase Fluid and Gas Mixtures
- Particles and Liquid Mixtures (Slurries)
- Gas and Liquid Mixtures
For the mixtures listed above, it is important to note that Flownex also allows mixtures of mixtures, for example, a mixture of liquids and a mixture of gasses can be used to create a new gas and liquid mixture.
A fluid mixture can be created by following the steps below.
STEP 1: OPEN THE "CHARTS AND LOOKUP TABLES" LIBRARY
Open the Charts and Lookup Tables library by clicking on the “Charts and Lookup Tables” tab.
STEP 2: OPEN "MATERIALS AND FLUIDS" IN THE FLOW SOLVER TREE
The user can expand the “Flow Solver” tree and then the “Materials and Fluids” tree in the Project Database, as shown in Figure 2.
STEP 3: ADD A NEW CATEGORY
Right-click on “Mixed Fluids” and select “Add Category”. The user can then also rename the newly created category.
STEP 4: ADD A NEW MIXED FLUID
Create the new mixed fluid by right-clicking on the newly added category and selecting “Add new Mixed Fluid”. The newly created fluid can then be renamed.
STEP 5: EDIT THE MIXED FLUID
The user can right-click on the newly created mixed fluid and edit the fluid to modify the mixture.
STEP 6: DEFINE THE FLUID MIXTURE
The fluid mixture can be defined by selecting the type of mixture, for example “Gas Mixture” and then selecting the necessary fluids that should form part of the mixture.
The mixing methods can then be specified, which determines how the Conductivity and Viscosity of the mixture will be calculated. The different Mixing Methods are described in detail in the Flownex® General User Manual. Lastly, the background fluid must be specified, which will be used as the main fluid in the mixture. The user can then click on the OK button.
STEP 7: ASSIGNING THE FLUID TO THE NETWORK
Once the mixture has been configured, the mixed fluid can be assigned to the network.
STEP 8: SPECIFYING MASS FRACTIONS
It is important to specify the mass fractions of the mixture on the appropriate Boundary Condition. The sum of the mass fractions should be equal to a value of 1. If the sum of mass fractions is less than one, the background fluid will be used to fill the remaining fraction. If the mass fractions for the mixture are not specified, the fluid selected as the background fluid will be used entirely.