Noise comming from right front wheel changed the brake pads and rotors didn' help, does not make the grinding noise when making a right turn

A grinding or rumbling noise can also be symptoms of a wheel bearing or constant velocity joint in a driveshaft. A worn wheel bearing can also cause a 'whistling' sound (as can a worn CV joint).

A grinding noise with brakes is either worn pads causing metal to metal contact on the brake disk/rotor, or the brake backing plate catching on a spinning rotor ... or a loose/missing anti squeal brake shim (they stop the pads from rattling and vibrating).

However, as you say a mechanic has looked at the brakes and can't find anything wrong .. I think I would begin to suspect a wheel bearing or constant velocity joint on the driveshaft (front wheel drive cars).

Brahe shoes wore and metal to metal rubbing, check wheel bearings, I would think you have the right size tires and are not rubbing.

could be a hub bearing or axle joint

Grinding is a sign on brakes in need of replacement. Your pads are worn through and now the metal backing plate of the pad is grinding up against the rotor. Replace the pads and rotors asap to prevent further damage.

I do think the same way. If the pads look flat and not so worn have the rotor turned to eliminate the squeaksyou are encountering

Does it happen all the time or when brakes are applied? Usally a bad bearing will cause a growling noise. I would check both the brake pads on the right side. Often the inner pad will wear off, then you have metal against metal, causing a grinding noise.

Check the condition of the wheel bearings, front and back side if the brake rotor, and the back side of the rim. Everything should be clean, rust build-up can throw everything out of true. The hub or wheel-bearing should be tight and smooth when spun.

Sounds like the pads are worn out and are grinding on the rotors. You will likely have to replace the pads and rotors.