Pengurangan hambatan aliran minyak bumi mentah menggunakan surfaktan pada pipa spiral segilima = Drag reduction by surfactant of crude oil flow in pentagon spiral pipe

Analisis karakteristik serat sabut kelapa terhadap pengurangan hambatan pada aliran dalam pipa bulat dan pipa spiral = Analysis of coconut fiber characteristic on drag reduction in circular and spiral pipe

Pengaruh nata de coco terhadap drag reduction dan degradasi pada aliran pipa spiral segi lima = The influence of nata de coco on drag reduction and degradation in the pentagon spiral pipe flow

Pengaruh aditif biopolimer carboxymethyl cellulose (CMC) terhadap karakteristik drag reduction pada aliran crude oil dalam pipa spiral = The effect of additive biopolimer carboxymethyl cellulose (CMC) to characteristics of drag reduction in to the flow of crude oil in spiral pipe

Hambatan gesek aliran lumpur dalam pipa 1/2 " dan pipa spiral p/DI = 4,3 = Drag reduction on mud slurry in circular pipe and spiral pipe P/Di = 4,3