抄録
It is important to reduce skin friction drag for engineering.Hydrophobic or hydrophilic surface is known to be effective in skin friction drag reduction.However,these drag reduction mechanisms are not yet well understood.Therefore,we painted the hydrophobic paint and the hydrophilic paint on the various surface materials of flat plates with the various patterns,and drag of these plates were measured under such various condition.As a result,it was found that skin friction drag on a flat plate with surface material of cloth with a vertical stripes-pattern of hydrophobic and hydrophilic surface can be reduced more than 11%.
