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Summary

When using the scheme Gauss CoBlended for the term div(phi,alpha) in the solver interFoam, the simulation breaks up with the following error message: fvSchemes:

div(phi,alpha)      Gauss CoBlended 1. Minmod 2. upwind;

logfile output:

--> FOAM FATAL ERROR:
  Operator + is undefined for unoriented and oriented types

    From function Foam::orientedType Foam::operator+(const Foam::orientedType&, const Foam::orientedType&)
    in file orientedType/orientedType.C at line 458.

Steps to reproduce

Use tutorial /multiphase/RAS/interFoam/damBreak. Change in fvSchemes:

div(phi,alpha)      Gauss CoBlended 1. Minmod 2. upwind;

Run the case with Allrun.

Example case

The damBreak tutorial (tutorials/multiphase/RAS/damBreak)

What is the current bug behaviour?

Run fails in first alpha-Subcycle. Logfile output:

 Courant Number mean: 0 max: 0
  Interface Courant Number mean: 0 max: 0
  deltaT = 0.00119048
  Time = 0.00119048

  PIMPLE: iteration 1
  smoothSolver:  Solving for alpha.water, Initial residual = 0, Final residual = 0, No Iterations 0
  Phase-1 volume fraction = 0.130194  Min(alpha.water) = 0  Max(alpha.water) = 1


  --> FOAM FATAL ERROR:
  Operator + is undefined for unoriented and oriented types

    From function Foam::orientedType Foam::operator+(const Foam::orientedType&, const Foam::orientedType&)
    in file orientedType/orientedType.C at line 458.

What is the expected correct behavior?

Normal interFoam-running would be expected.

Relevant logs and/or images

Environment information

OpenFOAM version :v1812 Operating system :centos Compiler :gcc

Possible fixes

## Reattaching the author to the issue ticket: @Lydia ##