TY - JOUR TI - A fractal model for pressure drop through a cigarette filter AU - Yang Zhanping AU - Zhang Li AU - Feng Dou AU - Li Jie AU - Wang Wenxuan AU - Yu Tao AU - Xu Ling-Yi AU - Yao Xin AU - Cao Jianhua AU - Feng Xiaomin JN - Thermal Science PY - 2020 VL - 24 IS - 4 SP - 2653 EP - 2659 PT - Article AB - A fractal model for pressure drop through a cigarette filter is suggested, the fractal dimensions of both a single fiber and the filter's cross-sections are calculated, which are two main factors affecting the pressure drop. The two-scale transform is made to convert the fractal derivative model on a smaller scale to an approximate continuous model on a larger scale, so that the model can be easily solved. An optimal filter structure is suggested for minimal pressure drop.