These two intriguing papers conclude chiral environments can be induced by directional stirring, where the direction of the chirality depends on the direction of stirring. And other work has shown that chiral environments steer the direction of chiral synthesis.*
So: If [direction of stirring] -> [direction of chirality of environment] -> [direction of chirality of synthesis], then the direction of stirring could affect chiral synthesis.
"Recently, several reports have suggested that the vortex flow of a solution of an achiral molecule gives rise to a CD signal, which is dependent on the stirring direction. This article introduces types of molecular architecture and material designs that show stir‐induced chirality....Supramolecular assemblies can be deformed to a chiral structure in a vortex flow which shows a CD signal even if the assemblies are achiral. ...Recently, we have shown that the stirring‐induced chirality caused by the host can be transferred to an achiral guest alignment. If such a transfer of chiral information could be realized on a molecular level from the vortex flow through a supramolecular aggregate to individual molecules, the consequences will be useful to a broad field in science and industry."
 Okano, Kunihiko, and Takashi Yamashita. "Formation of chiral environments by a mechanical induced vortex flow." ChemPhysChem 13.9 (2012): 2263-2271.
"This article introduces types of molecular architecture and material designs that show stir‐induced chirality.....Here we report that a solution of an achiral cationic gelator can vicariously transfer the macroscopic chirality of the vortex stirring towards an achiral molecule (in fact, a molecule showing racemic conformations)." 
 Okano, Kunihiko, et al. "Emergence of chiral environments by effect of flows: The case of an ionic oligomer and Congo red dye." Chemistry–A European Journal 17.34 (2011): 9288-9292.
*See for instance the following, which shows an example of how a chiral environment, created by a chiral solvent, "steers chiral synthesis": https://cen.acs.org/synthesis/catalysis/Solvent-steers-chiral-synthesis/97/web/2019/07