Drag reduction phenomena can be obtained using additive polymer that can generate turbulence damping by fluid movement and characteristic. Measurements were carried out to investigate pressure losses in square and rectangular horizontal ducts coating of additive Agar solution. with aspect ratios (e) = 1. 0 and 0. https://safeersappliancers.shop/product-category/neff-t56ub50x0-induction-hob/