CFD simulation of multifluid mixing and structure optimization of rotating liquid film reactor for magnesium hydroxide production

Homogeneous particle size distribution and morphology are crucial in the application of nanomaterials. Herein, the rotary liquid film reactor (RLFR) was manufactured and updated for the preparation of nano-sized Mg(OH) 2 . CFD simulation helped predict the fluid mixing and product formation under different condition during the synthesis of Mg(OH) 2 in the RLFR, and it was proposed that the mixing effect be evaluadted by the mass fraction of generated Mg(OH) 2 . It is found that by increasing the number of inlets, the uniformity of fluid distribution and mixing effect can be largely promoted with product mass fraction of 95.07 %. According to this, a 4-inlet RLFR was fabricated for the fast preparation of nano-sized Mg(OH) 2 . Compare to conventional RLFR, Mg(OH) 2 synthesized by the 4-inlet reactor presented regular crystalline structure, uniform morphology, and high dispersion, and the particle size is 56 nm. • Nano-Mg(OH) 2 can be continuously produced via rotating liquid film reactor. • CFD Simulation help to optimize the strucutre of rotating liquid film reactor. • Mixing efficiency of multifluid is evaluated by simulated mass fraction. • The average particle size of Mg(OH) 2 can be reduced to 56 nm.