The simulation results on viscoelastic fluid flows in sudden expansion geometry with different expansion ratios are presented.Oldroyd-B,linear Phan-Thien-Tanner
A new aromatic azo-polymer,poly(thiourea-azo-naphthyl)(PTAN),has been synthesized using 1-(5-thiocarbamoylaminonaphthyl)thiourea and diazonium salt solution of