aerodynamics - Is there ground effect flying below an infinite 2D plane as opposed to above one? - Aviation Stack Exchange

People talk about wing tip vortices and say things like the ground acts as an aerodynamic mirror. What (if any) difference would there be for a wing flying underneath a 2D plane? As in the picture

Does an aircraft with one set of wings generate the same amount of lift as an aircraft with wings stacked vertically that equal up to the same surface area? - Quora

Numerical simulation of DLR-F6 wing-body flow field in ground effect - ScienceDirect

Aerospace Engineering Blog, Science and Technology in Aerospace Engineering.

AERODYNAMICS- GROUND EFFECT

Fuel Consumption Mitigation of Aircraft by Applying Astonishing Ideas

Mirroring approach for ground effect aerodynamics evaluations.

Aerodynamic Principles Of Flight: Trivia Facts Quiz - Trivia & Questions

What is ground effect and why are the wings of an aircraft not placed in it? - Quora

Could the ground effect be exploited more? - Quora

PDF) Analysis of Wing in Ground Effect using Potential Flow Theory