TY - JOUR TI - Numerical investigation of non uniform heat transfer enhancement in parabolic trough solar collectors using dual modified twisted tape inserts AU - Afsharpanah, F. AU - Sheshpoli, A.Z. AU - Pakzad, K. AU - Mousavi Ajarostaghi, S.S. JO - Journal of Thermal Engineering PY - 2021 VL - 7 SP - 133 EP - 147 DO - 10.18186/thermal.846584 ER -