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Update on lateral friction #86

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Lateral friction is implemented using a biharmonic operator, with a Smagorinsky scaling parameter of 0.05066, which is equivalent to the isotropic scaling parameter of 2.0 in OM2. Additionally, a static biharmonic viscosity is applied as referenced in GFDL OM4 & OM5. Unlike OM2, MOM6 implements a slip BC for lateral velocity.

See COSIMA/access-om3#186

…rmonic operator, with a Smagorinsky scaling parameter of 0.05066, which is equivalent to the isotropic scaling parameter of 2.0 in OM2. Another static biharmonic viscosity is also applied as referenced from GFDL OM4 & OM5. Unlike OM2, MOM6 implements a slip BC for lateral velocity.
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