A composite drag control (CDC) combining the opposition (OC) and spanwise opposed wall-jet forcing (SOJF) methods is investigated. maximum reduction of about 33% obtained for CDC -- much higher than that produced by either individual method (namely, 19% SOJF 23% OC). Flow analysis shows can take advantage both OC to better suppress producing near-wall turbulent structures --vortices streaks. Ou...

statement of problem: in some clinical situations, repair of composite restorations is treatment of choice. improving the bond strength between one new and old composite usually requires increased surface roughness to promote mechanical interlocking since chemical bonding might not be adequate. similarly, the treatment of a laboratory fabricated resin composite restoration involves the same pro...