%0 Journal Article %T Numerical investigation of non uniform heat transfer enhancement in parabolic trough solar collectors using dual modified twisted tape inserts %A Afsharpanah, F. %A Sheshpoli, A.Z. %A Pakzad, K. %A Mousavi Ajarostaghi, S.S. %J Journal of Thermal Engineering %D 2021 %V 7 %P 133-147 %R 10.18186/thermal.846584