Household Portable Electric Blender Blade Design

[arpansen]

I want to to know the physics behind the design of the modern blender blade why is the design the way it is today..why only this specific design of blade is used?
Any reference to any research paper or article about the blade shape will be appreciated.

 

[Puma]

Generally Industrial designers take a design that works and largely copy it - they may change it a little on the basis of style and instinct. If it works why do more research? Having said that there is a good article here in what to look for in a good blender:

http://www.slate.com/articles/life/...any_and_analysis_of_the_blender_s_appeal.html

It turns out, vessel shape, speed/power and nearness of the blades to the sides of the vessel are the main factors to look for.