Document Type : Full Research Paper


1 PHD student. mechanical engineering. Yazd university. هقشد

2 Associate Professor, Mechanical Engineering Department

3 Assistant Professor. Biomedical Engineering. University of Calgary. Canada



Early recognition of common diseases, including cancer, plays an essential role in preventing the progression of the disease. Among the various methods that have been invented for blood monitoring in recent years, the methods based on the use of micro-scale flow have received special attention. Isolation of biological nanoparticles is widely used in diagnosis, treatment and care in the field of medicine. Recent research on nano-sized extracellular carriers is of interest in the field of medicine. Biological nanoparticles such as viruses, DNA, proteins and exosomes contain significant information that can help diagnose and treat diseases such as cancer. One of the practical and effective methods for separating nanoparticles is the use of viscoelastic fluid, which does not have the complications of other methods. Unlike microparticles, the number of studies in the field of bio nanoparticles is low. Since previous research in the field of nanoparticle separation lacks comprehensive numerical information about the effect of aspect ratio and polymer concentration, in this article, the viscoelastic fluid flow along with particle physics has been numerically simulated with Comsol Multiphysics software. The effective parameters including aspect ratio 1, 1.5 and 2 and polymer concentration 0.05, 0.15 and 0.25 % have been investigated in the separation of 1000 up to 100 nm particles. Separation of 300 and 500 nm particles at a concentration of 0.05% and the channel with an aspect ratio 1 and 1.5 has been obtained from the other particles. It is possible to separate the particle 100nm as exosome particle from the other particles at an aspect ratio 2 and a polymer concentration of 0.05% as the best choice


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