The original paper reported a heat transfer gain of up to 80% of the optimized elliptical tubes arrangement with respect to the optimized circular one. In fact, the actual heat transfer gain found experimentally is up to 23% only. Therefore corrections are needed in the paper, as follows.
(1) Abstract: correct to “…A relative heat transfer gain of up to 23% ” and “…A relative heat transfer gain of 23% is.”
(2) Section 4 Results and Discussion:
Correct Eq. (10) to “, ”
Correct the 7th paragraph to: “In sum, a heat transfer gain of up to 23% was observed.”
(3) Section 5 Conclusions: correct the 2nd paragraph to “…The three-way optimized elliptic arrangement exhibits a heat transfer gain of up to 23% relative to.”