Dic/ will

10. MODAL

You use will to indicate that an action usually happens in the particular way mentioned.

• The thicker the material, the less susceptible the garment will be to wet conditions.   
• There's no snake known that will habitually attack human beings unless threatened with its life.

11. MODAL

You use will in the main clause of some 'if' and 'unless' sentences to indicate something that you consider to be fairly likely to happen.     

• If you overcook the pancakes they will be difficult to roll.

... Cobuild

***

4.[what generally happens] used to say what always happens in a particular situation or what is generally true:

• Oil will float on water.  
• Accidents will happen.

5.[possibility] used like 'can' to show what is possible:

• This car will hold five people comfortably.

6.[belief] used to say that you think something is true:

• That will be Tim coming home now.  
• As you will have noticed, there are some gaps in the data.

... Longman. http://www.ldoceonline.com/dictionary/will_1