American Journal of Physics and Applications

Volume 11, Issue 4, July 2023

  • Research Article

    Electronic and Mechanical Properties of Chemical Bonds (A-O & B-O) in Cubic Phase A+2B+4O3 Perovskite Oxides

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

    Issue: Volume 11, Issue 4, July 2023
    Pages: 80-88
    Received: Sep. 25, 2023
    Accepted: Oct. 16, 2023
    Published: Nov. 09, 2023
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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 (Eh) and heteropolar/ ionic gap (Ec) of the chemical bonds A-O a... Show More
  • 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: Oct. 05, 2023
    Accepted: Nov. 03, 2023
    Published: Nov. 17, 2023
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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