The current article discusses the peristaltic flow of the Casson fluid model with implications for double diffusivity,radiative flux,variable conductivity and viscosity.This study offers a thorough understanding of th...The current article discusses the peristaltic flow of the Casson fluid model with implications for double diffusivity,radiative flux,variable conductivity and viscosity.This study offers a thorough understanding of the functioning and illnesses of embryological organs,renal systems,respiratory tracts,etc.,that may be useful to medical professionals and researchers.The main purpose of the study is to evaluate the consequences of double diffusivity on the peristaltic flow of nanofluid.By implementing the appropriate transformation,the governed differential equations of momentum,temperature,concentration and double diffusivity are worked out numerically.The lowest Reynolds number Re→0 and highest wavelength�→∞are used.The ramifications of pertinent parameters on the velocity field,heat,chemical reaction rate and double diffusivity are discussed by plotting the graphs using the bvp4c technique.Our analysis shows that solutal and thermal Grashof numbers enhance the motion of fluid flow over the pumping area of the peristaltic boundary.The activation energy and Lewis number indicate the opposite impact on concentration distribution.Due to variations in thermophoresis and the Brownian parameter,the heating process slows during the pumping section and accelerates during the free pumping section.The graph of double diffusivity initially goes upward by escalating Dufour and Brownian parameters and then moves down over the right sinusoidal geometry.展开更多
To make backfilling body meet strength requirement,physical-chemical evaluation and proportioning tests were conducted on several backfilling materials.Jigging sands,#32.5 cement and fly ash were determined as backfil...To make backfilling body meet strength requirement,physical-chemical evaluation and proportioning tests were conducted on several backfilling materials.Jigging sands,#32.5 cement and fly ash were determined as backfilling aggregate,binding material and modified material,respectively.An optimized proportion of backfilling materials with a solid mass fraction of 78%and cement:fly ash:jigging sands mass ratio of 1:2:14,was suggested to Jiangan Pyrite Mine,China.The slurry made by optimized proportion produced obvious shear thinning phenomena,and was confirmed as paste-like slurry.To analyze its rheological characteristics,L-type pipeline test and Haake VT550 rotational viscometer test were conducted.Bingham and Casson fluid models were applied to several paste-like slurry samples to simulate flow and stress states;Casson fluid model was proved to have better simulation effect on paste-like slurry with shear thinning phenomena;rheological parameters of backfilling slurry made by suggested proportion were measured.Initial yield stress,average apparent viscosity and limiting viscosity are 55.35 Pa,1.216 Pa-s and 0.48 Pa-s,respectively.Compared with Bingham fluid model,Casson fluid model has a better simulation effect on paste-like slurry with shear thinning phenomena,through calculating the residual standard deviations.展开更多
文摘The current article discusses the peristaltic flow of the Casson fluid model with implications for double diffusivity,radiative flux,variable conductivity and viscosity.This study offers a thorough understanding of the functioning and illnesses of embryological organs,renal systems,respiratory tracts,etc.,that may be useful to medical professionals and researchers.The main purpose of the study is to evaluate the consequences of double diffusivity on the peristaltic flow of nanofluid.By implementing the appropriate transformation,the governed differential equations of momentum,temperature,concentration and double diffusivity are worked out numerically.The lowest Reynolds number Re→0 and highest wavelength�→∞are used.The ramifications of pertinent parameters on the velocity field,heat,chemical reaction rate and double diffusivity are discussed by plotting the graphs using the bvp4c technique.Our analysis shows that solutal and thermal Grashof numbers enhance the motion of fluid flow over the pumping area of the peristaltic boundary.The activation energy and Lewis number indicate the opposite impact on concentration distribution.Due to variations in thermophoresis and the Brownian parameter,the heating process slows during the pumping section and accelerates during the free pumping section.The graph of double diffusivity initially goes upward by escalating Dufour and Brownian parameters and then moves down over the right sinusoidal geometry.
基金Project(2012BAC09B02)supported by the National Science and Technology Pillar Program during the 12th Five-Year Plan Period,China
文摘To make backfilling body meet strength requirement,physical-chemical evaluation and proportioning tests were conducted on several backfilling materials.Jigging sands,#32.5 cement and fly ash were determined as backfilling aggregate,binding material and modified material,respectively.An optimized proportion of backfilling materials with a solid mass fraction of 78%and cement:fly ash:jigging sands mass ratio of 1:2:14,was suggested to Jiangan Pyrite Mine,China.The slurry made by optimized proportion produced obvious shear thinning phenomena,and was confirmed as paste-like slurry.To analyze its rheological characteristics,L-type pipeline test and Haake VT550 rotational viscometer test were conducted.Bingham and Casson fluid models were applied to several paste-like slurry samples to simulate flow and stress states;Casson fluid model was proved to have better simulation effect on paste-like slurry with shear thinning phenomena;rheological parameters of backfilling slurry made by suggested proportion were measured.Initial yield stress,average apparent viscosity and limiting viscosity are 55.35 Pa,1.216 Pa-s and 0.48 Pa-s,respectively.Compared with Bingham fluid model,Casson fluid model has a better simulation effect on paste-like slurry with shear thinning phenomena,through calculating the residual standard deviations.
