Boundary layer flow with heat and mass transfers over a stretching/shrinking cylinder has been investigated. The governing partial differential equations are converted into a set of ordinary differential equations using suitable similarity transformations and have been solved numerically using MATLAB built in bvp4c solver technique. The numerical results are graphically discussed in the form of velocity, temperature and concentration distributions for various values of flow parameters. Numerical results show that dual solutions are possible in specific range of the suction parameter. A stability analysis is executed to obtain which solution is linearly stable and physically realizable.

Present paper deals with the Orchid species diversity of Joypur reserve forest of Dibrugarh district of Assam of North East India. A total of 107 Orchid species with 47 genera have been recorded from the region. Of them, 82 are epiphytic, 23 are terrestrial and 2 species like Didymoplexis pallens and Epipogium roseum are saprophytic. This attempt is the first step to correct taxonomic identification to workout currently accepted botanical names, voucher specimen, habitat, phenology and locality of Orchid species occurring in the study regions.

No abstract

Present paper deals with the present status of Orchid diversity resources in Dibrugarh District of Assam of North East India. A total of 113 Orchid species under 50 genera have been recorded from the regions. Of them, 29 species with 17 genera are terrestrial and the rest 84 species with 33 genera are epiphytic. This attempt is the first step to correct taxonomic identification and assessment to workout currently accepted botanical names, Voucher specimen, habitat, phenology and locality of Orchid species occurring in Dibrugarh District of Assam of North East India.

The endeavor of this study is to explore the nature of dual solutions (steady and unsteady) for the Casson fluid flow with the simultaneous consequences of both thermal and mass transmissions. The flow passes above an absorbent elongating sheet in the existence of a constant magnetic field. The supported leading equations are remodeled into a set of solvable forms with the assist of suitable similarity variables and hence deciphered utilizing the “MATLAB routine bvp4c scheme.” Due to the sudden changes in the surface with time, the temperature and flow behavior over the sheet also change, and hence dual‐type flow solutions exist. Stability scrutiny is implemented to examine the less (more) stable and visually achievable solutions. From this study, we have achieved many interesting facts, among them, we can use magnetic and Casson fluid parameters to control the motion of the fluid and to enlarge of thermal transmission of the fluid. This flow model has many important applications in different physical fields, such as engineering sciences, medical sciences, and different industrial processes. One of the most important results, which has been achieved from this investigation, is that the Prandtl number enriches the heat transfer rate of the fluid at the surface during the time‐independent case under the suction environment. Also, the chemical reaction parameter helps to enhance the mass accumulation rate of the fluid in both cases.