Can 'shock waves' occur in viscous fluid flows?

diaw

Is it theoretically possible that shock-waves ('bumps') - perhaps of extended spatial dimension - could exist in viscous, low-speed fluid flows?

In other words - reasonably abrupt changes of a fluid property - specifically pressure, or velocity - in the flow domain.

Does anyone have experience with 'solution wave phenomena' in flow simulations of viscous, low-speed fluid flows? Are these purely simulation abberations, or is there a physical explanation?

I am looking for some solid academic references to either totally disprove, or potentially support/explain this phenomenon. I would really appreciate candid constructive comments around these issues. Thanks so much.

diaw...