RANCANGAN HEAT EXCHANGER JENIS SHELL AND TUBE UNTUK PRODUKSI NANOPARTIKEL Fe3O4 SKALA INDUSTRI: DESIGN OF SHELL AND TUBE TYPE HEAT EXCHANGER FOR INDUSTRIAL SCALE Fe3O4 NANOPARTICLE PRODUCTION USING MATHEMATIC MODELING. Fraction: Jurnal Teori dan Terapan Matematika, [S. l.], v. 2, n. 2, p. 46–52, 2022. DOI: 10.33019/fraction.v2i2.33. Disponível em: https://fraction.ubb.ac.id/index.php/fraction/article/view/33. Acesso em: 1 nov. 2025.