Defining the Inner and Outer Non-Newtonian Phases

You use the generalized Newtonian Power Law model to characterize the rheological behaviour of both the inner and outer phases. Each phase has its own set of model parameters to describe the shear-thinning viscosity.

To define the inner and outer non-Newtonian phases:

  1. Create the outer phase:
    1. Expand the Physics 1 > Models > Multiphase node.
    2. Right-click the Phases node and select New.
    3. Rename the Phases > Phase 1 node to Outer Phase.
    4. Right-click the Phases > Outer Phase > Models node and select the following models:
      Group Box Model
      Enabled Models

      Laminar (selected automatically)

      Constant Density (selected automatically)

      Liquid (selected automatically)
      Rheology Generalized Newtonian
    5. Click Close.
  2. Analogous to Step 1, create another phase called Inner Phase and select the same phase models.
    The selected models for both phases appear as shown below:

  3. Define the outer phase material:
    1. Rename the Outer Phase > Models > Liquid > H2O node to Outer Material.
    2. Select the Outer Material > Material Properties > Dynamic Viscosity node and set Method to Non-Newtonian Generalized Power Law.
    3. Select the Dynamic Viscosity > Non-Newtonian Genaralized Power Law node and set the following properties:
      Property Setting
      Consistency Factor 126000.0
      Power Law Exponent 0.78
      Maximum Viscosity Limit 1.0E8 Pa-s
  4. Define the inner phase material:
    1. Rename the Inner Phase > Models > Liquid > H2O node to Inner Material.
    2. Select the Inner Material > Material Properties > Dynamic Viscosity node and set Method to Non-Newtonian Generalized Power Law.
    3. Select the Dynamic Viscosity > Non-Newtonian Genaralized Power Law node and set the following properties:
      Property Setting
      Consistency Factor 106000.0
      Power Law Exponent 0.65
      Maximum Viscosity Limit 1.0E8 Pa-s
  5. Save the simulation.