Archive:: American Journal of Physics and Applications:: Science Publishing Group

Volume 11, Issue 4, July 2023

Research Article
Electronic and Mechanical Properties of Chemical Bonds (A-O & B-O) in Cubic Phase A⁺²B⁺⁴O₃Perovskite Oxides

Niharika Yadav, Dhirendra Singh Yadav^*, Preeti Varshney, Rajesh Chandra Gupta

Issue: Volume 11, Issue 4, July 2023

Pages: 80-88

Received: 25 September 2023

Accepted: 16 October 2023

Published: 9 November 2023

DOI: 10.11648/j.ajpa.20231104.11

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Abstract: In the present manuscript, electronic and mechanical properties of a series of ABO₃ (A→ alkaline earth metals, B→ transition metal) perovskites are presented. Using the plasma oscillation theory of solids, empirical relations are proposed for computation of the homopolar/ covalent gap (E_h) and heteropolar/ ionic gap (E_c) of the chemical bonds A-O a... Show More

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Research Article
Heat Transfer Behavior of a PTC Receiver Tube Using Transversal Focal Inserts and CFD

Haddouche Mohammed Reda^*, Haddouche Abdelhadi, Benazza Abdelylah

Issue: Volume 11, Issue 4, July 2023

Pages: 89-98

Received: 5 October 2023

Accepted: 3 November 2023

Published: 17 November 2023

DOI: 10.11648/j.ajpa.20231104.12

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Abstract: In this paper the thermohydraulic performance of an improved Parabolic Trough Collector tube is investigated. Since the absorber tube of the Parabolic Trough Collector is subjected to non-uniform heat flux, and the focal part of the absorber is subjected to a concentrated solar flux, a temperature gradient on the tube circumferential surface is pro... Show More

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