Comparison study of vertical and horizontal elastic wall on vented square enclosure filled by nanofluid and hexagonal shape with MHD effectQusay Rasheed Al-Amir, Hameed K. Hamzah, Farooq H. Ali, Seyfettin Bayraktar, Müslüm Arıcı and Mohammad HatamiEur. Phys. J. Spec. Top., 231 13-14 (2022) 2623-2643DOI: https://doi.org/10.1140/epjs/s11734-022-00582-x