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Problem with 3 Phase Flow

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The problem is of 3-phase flow of water, oil and air. I used basic materials for this, and yet, I am getting this error, where muB is the Bulk viscosity of water:

"Failed to evaluate initial residual for segregated step 1. Undefined material property 'muB' required by Three-Phase Flow, Phase Field 1 (tfpf1)"

I checked the bulk viscosity definition for water, and COMSOL says here: Air and Water Properties that it is defined as: 2.79 * dynamic viscosity, internally. This dynamic viscosity in turn is just defined as: eta(T). Nothing more. There are lots of other variables defined as a relation of time. I have no idea what to do with this.

Here's an image of the material definition: Water Material Properties


1 Reply Last Post 2023年6月11日 GMT-4 13:12
Edgar J. Kaiser Certified Consultant

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Posted: 1 year ago 2023年6月11日 GMT-4 13:12

T is temperature, not time.

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Edgar J. Kaiser
emPhys Physical Technology
www.emphys.com
T is temperature, not time.

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