Author
Boming Yu
Other affiliations: Southwest Petroleum University, Chinese Academy of Sciences, Ohio State University ...read more
Bio: Boming Yu is an academic researcher from Huazhong University of Science and Technology. The author has contributed to research in topics: Fractal & Porous medium. The author has an hindex of 44, co-authored 118 publications receiving 6834 citations. Previous affiliations of Boming Yu include Southwest Petroleum University & Chinese Academy of Sciences.
Topics: Fractal, Porous medium, Fractal dimension, Tortuosity, Fractal analysis
Papers published on a yearly basis
Papers
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TL;DR: In this paper, a fractal model for bi-dispersed porous media is developed based on the fractal characteristics of pores in the media, which is found to be a function of the tortuosity fractal dimension, pore area fractal dimensions, sizes of particles and clusters, micro-porosity inside clusters, and the effective porosity of a medium.
785 citations
TL;DR: In this article, a unified model for describing the fractal characters of porous media is deduced, and theoretical predictions from the proposed unified model are compared with those from the previous models and from the box-counting method.
Abstract: In this paper, a unified model for describing the fractal characters of porous media is deduced. The theoretical predictions from the proposed unified model are compared with those from the previous models and from the box-counting method. The results from the proposed model are found to be in good agreement with both the previous models and box-counting method. The results also indicate that the proposed unified model is applicable to both the exactly and statistically self-similar fractal media. A statistical property of porous media is also described based on the basic fractal theory and technique. A criterion, for determining whether a porous medium can be characterized by fractal theory and technique or not, is proposed based on the fractal statistical property.
627 citations
TL;DR: In this article, the authors derived an analytical expression for the permeability in homogeneous porous media based on the fractal characters of porous media and capillary model, which is expressed as a function of fractal dimensions, porosity and maximum pore size.
577 citations
TL;DR: Based on the tortuous capillary model and fractal geometry, the effect of tortuosity on the capillary imbibition in wetting porous media is discussed in this article, where the average height growth of wetting liquid in porous media driven by capillary force following the Lucas-Washburn (LW) law is obtained.
Abstract: In the past decades, there was considerable controversy over the Lucas–Washburn (LW) equation widely applied in capillary imbibition kinetics. Many experimental results showed that the time exponent of the LW equation is less than 0.5. Based on the tortuous capillary model and fractal geometry, the effect of tortuosity on the capillary imbibition in wetting porous media is discussed in this article. The average height growth of wetting liquid in porous media driven by capillary force following the \({\overline L _{\rm {s}}(t)\sim t^{1/{2D_{\rm {T}}}}}\) law is obtained (here DT is the fractal dimension for tortuosity, which represents the heterogeneity of flow in porous media). The LW law turns out to be the special case when the straight capillary tube (DT = 1) is assumed. The predictions by the present model for the time exponent for capillary imbibition in porous media are compared with available experimental data, and the present model can reproduce approximately the global trend of variation of the time exponent with porosity changing.
360 citations
TL;DR: Fractal geometry and technique have the potentials in analysis of flow and transport properties in fractal porous media as mentioned in this paper, and they have been used extensively in the past few decades.
Abstract: The flow in porous media has received a great deal of attention due to its importance and many unresolved problems in science and engineering such as geophysics, soil science, underground water resources, petroleum engineering, fibrous composite manufacturing, biophysics (tissues and organs), etc. It has been shown that natural and some synthetic porous media are fractals, and these media may be called fractal porous media. The flow and transport properties such as flow resistance and permeability for fractal porous media have steadily attracted much attention in the past decades. This review article intends to summarize the theories, methods, mathematical models, achievements, and open questions in the area of flow in fractal porous media by applying the fractal geometry theory and technique. The emphases are placed on the theoretical analysis based on the fractal geometry applied to fractal porous media. This review article shows that fractal geometry and technique have the potentials in analysis of flow and transport properties in fractal porous media. A few remarks are made with respect to the theoretical studies that should further be made in this area in the future. This article contains 220 references.
343 citations
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971 citations
TL;DR: In this article, the effects of particle volume fraction, temperature and particle size on thermal conductivity of alumina/water and copper oxide/water nanofluids were investigated.
886 citations
TL;DR: In this paper, a fractal model for bi-dispersed porous media is developed based on the fractal characteristics of pores in the media, which is found to be a function of the tortuosity fractal dimension, pore area fractal dimensions, sizes of particles and clusters, micro-porosity inside clusters, and the effective porosity of a medium.
785 citations
TL;DR: In this article, a critical review of research on heat transfer applications of nanofluids with the aim of identifying the limiting factors so as to push forward their further development is presented.
697 citations
TL;DR: In this article, a unified model for describing the fractal characters of porous media is deduced, and theoretical predictions from the proposed unified model are compared with those from the previous models and from the box-counting method.
Abstract: In this paper, a unified model for describing the fractal characters of porous media is deduced. The theoretical predictions from the proposed unified model are compared with those from the previous models and from the box-counting method. The results from the proposed model are found to be in good agreement with both the previous models and box-counting method. The results also indicate that the proposed unified model is applicable to both the exactly and statistically self-similar fractal media. A statistical property of porous media is also described based on the basic fractal theory and technique. A criterion, for determining whether a porous medium can be characterized by fractal theory and technique or not, is proposed based on the fractal statistical property.
627 citations