Why the water flowing out of bathtub rotates always in the same direction?

In FB Wes Johnson wondered whether Coriolis force could explain why the water flowing out of bathtub forms a vortex with direction which is opposite at Northern and Southern hemispheres.

Coriolis effect is a coordinate force proportional to ω× v, where ω is the angular velocity of Earth directed to Noth and v is the velocity of the object. For bathtub v would be downwards, that is in the direction of Earth radius. At the  equator Coriolis force  is  along the equator  and non-vanishing. On the other hand, the force causing rotation of water in the bathtub is of opposite sign below and above equator and therefore vanishes at equator. Therefore Coriolis force is excluded as an explanation.

My own view is that this is a hydrodynamical effect and new physics might be involved.   Turbulence is involved and   vortex is generated.  The direction  of the  rotation of the vortex should be understood. The selection of a specific direction violates parity symmetry and this gives in the TGD framework strong guidelines.  

1.   The   vortex is in the direction of the  Earth's gravitational force. In the TGD framework,  gravitational interaction is mediated by monopole flux tubes in the direction of the gravitational field. Quantum gravitation is involved and it is quite possible that the gravitational magnetic body (MB) induces the effect since quite generally MB plays a control role, in particular in living matter.
2.    The induced Kähler field contributes to both electromagnetic and classical (weak) Z⁰ field:  since the matter is em neutral but not Z⁰ neutral, it  seems that   Z⁰ field  must be in question. Could the gravitational MB  of Earth consist  of Z⁰ monopole flux tubes?

   If this is the case, a macroscopic quantum effect involving a very large value ℏ_gr=GMm/β₀ of gravitational Planck constant of the pair formed by Earth mass and particle must be in question since ordinary Z⁰ has extremely short range. The gravitational Compton length Λ_gr = ℏ_gr/m= GM/β₀= r_S/2β₀ does not depend on particle mass and Z⁰ is about .5 cm, one half of the Schwartschild radius of the Earth, for the favored β₀=v₀/c=1.

3.   In the classical Z⁰ field,  particles with Z⁰ charges rotate around the axis of the field and since magnetic flux is approximately dipole field, the flux lines  are radial but  are upwards/downwards above/below the equator. This would explain why the rotation directions of the vortex are  opposite and Northern and Southern hemispheres. The presence of the classical Z⁰ field, which violates parity symmetry, would also conform with the parity breaking and would be essential for the understanding of the mystery of chiral selection in biomatter.

For a summary of earlier postings see Latest progress in TGD. For the lists of articles (most of them published in journals founded by Huping Hu) and books about TGD see this.