I'm back at school now and it feels so much better swimming at my schools pool than at my local Y becasuse my school pool has a 13 feet deep end. the Y is shallow, its 3 feet on one end.
Deep water is so much better than shallow water.
I only mention that water is a fluid which has viscosity or the resistance to flow. That is a constant, but it is this property that causes a resistant force which is inversely proportional to the depth of the water. For a swimmer in deep water, the depth of the water is not the dominant resistant force. The dominant resistance is the drag created by our bodies in the water. When the depth of the water is significantly reduced the shear force is increased as the depth is decreased due to an increased change in angular velocity and this added component in the total equation becomes significant enough to be felt and it slows us down.
My feeling is that at depth of 3 feet, it is significant and falls out of the resistance equation at 7 feet. That is a guess. I'm sure this research has been exhaustive and well defined.
Good explanation. You must have pulled out the fluids text and read up.
It's been so long I'm not even sure where mine is any more. I probably couldn't make sense out of what I was reading anyway.:dunno:
I think that's why some coaches want their swimmers dolphining on their sides. Unless one is in the outside lanes, it makes the walls the bottom thereby increasing the effective depth of the pool.
I only mention that water is a fluid which has viscosity or the resistance to flow. That is a constant, but it is this property that causes a resistant force which is inversely proportional to the depth of the water. For a swimmer in deep water, the depth of the water is not the dominant resistant force. The dominant resistance is the drag created by our bodies in the water. When the depth of the water is significantly reduced the shear force is increased as the depth is decreased due to an increased change in angular velocity and this added component in the total equation becomes significant enough to be felt and it slows us down.
My feeling is that at depth of 3 feet, it is significant and falls out of the resistance equation at 7 feet. That is a guess. I'm sure this research has been exhaustive and well defined.
Good explanation. You must have pulled out the fluids text and read up.
It's been so long I'm not even sure where mine is any more. I probably couldn't make sense out of what I was reading anyway.:dunno:
I think that's why some coaches want their swimmers dolphining on their sides. Unless one is in the outside lanes, it makes the walls the bottom thereby increasing the effective depth of the pool.
