Creat membership Creat membership
Sign in

Forgot password?

Confirm
  • Forgot password?
    Sign Up
  • Confirm
    Sign In
home > search

Now showing items 1 - 16 of 37

  • Rayleigh-Taylor instability of swirling annular layer with mass transfer

    Awasthi, Mukesh Kumar  

    Download Collect
  • Bio-degradation of oily food waste employing thermophilic bacterial strains

    Awasthi, Mukesh Kumar   Selvam, Ammaiyappan   Chan, Man Ting   Wong, Jonathan W.C.  

    Download Collect
  • Pressure Corrections for the Potential Flow Analysis of Kelvin-Helmholtz Instability

    Awasthi, Mukesh Kumar   Asthana, Rishi   Agrawal, G.S.  

    The present paper deals with the study of viscous contribution to the pressure for the viscous potential flow analysis of Kelvin-Helmholtz instability of two viscous fluids. Viscosity enters through normal stress balance in the viscous potential flow theory and tangential stresses for two fluids are not continuous at the interface. Here we have considered viscous pressure in the normal stress balance along with the irrotational pressure and it is assumed that the addition of this viscous pressure will resolve the discontinuity between the tangential stresses and the tangential velocities at the interface. The viscous pressure is derived by mechanical energy equation and this pressure correction applied to compute the growth rate of Kelvin-Helmholtz instability. A dispersion relation is obtained and a stability criterion is given in the terms of critical value of relative velocity. It has been observed that the inclusion of irrotational shearing stresses stabilizes the system.
    Download Collect
  • Evaluation of thermophilic fungal consortium for organic municipal solid waste composting

    Awasthi, Mukesh Kumar   Pandey, Akhilesh Kumar   Khan, Jamaluddin   Bundela, Pushpendra Singh   Wong, Jonathan W.C.   Selvam, Ammaiyappan  

    Influence of fungal consortium and different turning frequency on composting of organic fraction of municipal solid waste (OFMSW) was investigated to produce compost with higher agronomic value. Four piles of OFMSW were prepared: three piles were inoculated with fungal consortium containing 5 l each spore suspensions of Trichoderma viride, Aspergillus niger and Aspergillus flavus and with a turning frequency of weekly (Pile 1), twice a week (Pile 2) and daily (Pile 3), while Pile 4 with weekly turning and without fungal inoculation served as control. The fungal consortium with weekly (Pile 1) turning frequency significantly affected temperature, pH, TOC, TKN, C/N ratio and germination index. High degradation of organic matter and early maturity was observed in Pile 1. Results indicate that fungal consortium with weekly turning frequency of open windrows were more cost-effective in comparison with other technologies for efficient composting and yield safe end products. (C) 2014 Elsevier Ltd. All rights reserved.
    Download Collect
  • Pressure corrections for viscous potential flow analysis of radial fingering in Hele-Shaw cell

    Awasthi, Mukesh Kumar   Asthana, Rishi   Agrawal, G. S.  

    Pressure corrections for the viscous potential flow analysis of radial fingering in two-phase gas/liquid flow in a Hele-Shaw cell were determined. In viscous potential flow theory, viscosity enters through the normal stress balance and the effect of shearing stresses is completely neglected. We have included viscous pressure in the normal stress balance, along with irrotational pressure, and it is assumed that this viscous pressure will resolve the discontinuity of the shearing stresses at the interface of two fluids. Both fluids are taken as viscous and incompressible with different mobilities. A dispersion relation was obtained, and stability is discussed both theoretically as well as numerically. It was observed that the effect of irrotational shearing stresses stabilizes the system.
    Download Collect
  • Nonlinear Study of Kelvin-Helmholtz instability of cylindrical flow with mass and heat transfer

    Awasthi, Mukesh Kumar   Asthana, Rishi   Uddin, Ziya  

    Download Collect
  • Critical evaluation of post-consumption food waste composting employing thermophilic bacterial consortium

    Awasthi, Mukesh Kumar   Selvam, Ammaiyappan   Lai, Ka Man   Wong, Jonathan W.C.  

    Download Collect
  • Viscous potential flow analysis of capillary instability with heat and mass transfer through porous media

    Awasthi, Mukesh Kumar   Asthana, Rishi  

    The capillary instability of the cylindrical interface separating two viscous and incompressible fluids through porous medium is studied using viscous potential flow theory, when there is heat and mass transfer across the interface. The fluids are considered to be viscous and incompressible with different kinematic viscosities. A dispersion relation that accounts for the growth of axisymmetric waves is derived and stability is discussed theoretically as well as numerically. Stability criterion is given in terms of critical value of wave number. Various graphs have been drawn to show the effect of various physical parameters such as heat transfer capillary number, viscosity ratio, permeability and porosity on the stability of the system. It has been observed that porous media and heat transfer both have stabilizing effect while porosity has destabilizing effect on the stability of the system. (c) 2012 Elsevier Ltd. All rights reserved.
    Download Collect
  • PRESSURE CORRECTIONS FOR THE VISCOELASTIC POTENTIAL FLOW ANALYSIS OF ELECTROHYDRODYNAMIC CAPILLARY INSTABILITY

    AWASTHI, MUKESH KUMAR   TIWARI, D. K.   ASTHANA, RISHI  

    Pressure corrections for the viscoelastic potential flow analysis of capillary instability in the presence of axial electric field has been carried out. In viscoelastic potential flow theory, viscosity enters through normal stress balance and the effects of shearing stresses are completely neglected. We include the viscous pressure in the normal stress balance along with irrotational pressure and it is assumed that this viscous pressure will resolve the discontinuity of the tangential stresses at the interface for two fluids. A dispersion relation is derived for the case of axially imposed electric field and stability is discussed in terms of various parameters such as electric field, Deborah number, Ohnesorge number, permittivity ratio and conductivity ratio etc. Stability criterion is given in terms of critical value of wave number as well as critical value of applied electric field. The system is unstable when electric field is less than the critical value of electric field, otherwise it is stable. It has been found that irrotational shearing stresses have stabilizing effect on the stability of the system.
    Download Collect
  • Onset of triply diffusive convection in a Maxwell fluid saturated porous layer with internal heat source

    Awasthi, Mukesh Kumar   Kumar, Vivek   Patel, Ravi Kumar  

    Download Collect
  • Feasibility of medical stone amendment for sewage sludge co-composting and production of nutrient-rich compost

    Awasthi, Mukesh Kumar   Wang, Quan   Awasthi, Sanjeev Kumar   Li, Ronghua   Zhao, Junchao   Ren, Xiuna   Wang, Meijing   Chen, Hongyu   Zhang, Zengqiang  

    Download Collect
  • Viscous Potential Flow Analysis of Electroaerodynamic Instability of a Liquid Sheet Sprayed with an Air Stream

    Awasthi, Mukesh Kumar   Srivastava, Vineet K.   Tamsir, M.  

    The instability of a thin sheet of viscous and dielectric liquid moving in the same direction as an air stream in the presence of a uniform horizontal electric field has been carried out using viscous potential flow theory. It is observed that aerodynamic-enhanced instability occurs if the Weber number is much less than a critical value related to the ratio of the air and liquid stream velocities, viscosity ratio of two fluids, the electric field, and the dielectric constant values. Liquid viscosity has stabilizing effect in the stability analysis, while air viscosity has destabilizing effect.
    Download Collect
  • In-vessel co-composting of biosolid: Focusing on mitigation of greenhouse gases emissions and nutrients conservation

    Awasthi, Mukesh Kumar   Wang, Quan   Chen, Hongyu   Wang, Meijing   Awasthi, Sanjeev Kumar   Ren, Xiuna   Cai, Hanzhen   Li, Ronghua   Zhang, Zengqiang  

    Download Collect
  • Influence of biochar on volatile fatty acids accumulation and microbial community succession during biosolids composting

    Awasthi, Mukesh Kumar   Awasthi, Sanjeev Kumar   Wang, Quan   Wang, Zhen   Lahori, Altaf Hussain   Ren, Xiuna   Chen, Hongyu   Wang, Meijing   Zhao, Junchao   Zhang, Zengqiang  

    Download Collect
  • Role of biochar amendment in mitigation of nitrogen loss and greenhouse gas emission during sewage sludge composting

    Awasthi, Mukesh Kumar   Wang, Quan   Ren, Xiuna   Zhao, Junchao   Huang, Hui   Awasthi, Sanjeev Kumar   Lahori, Altaf Hussain   Li, Ronghua   Zhou, Lina   Zhang, Zengqiang  

    Download Collect
  • VISCOUS CONTRIBUTIONS TO THE PRESSURE FOR THE POTENTIAL FLOW ANALYSIS OF MAGNETOHYDRODYNAMIC KELVIN–HELMHOLTZ INSTABILITY

    AWASTHI, MUKESH KUMAR   AGRAWAL, G. S.  

    The present paper deals with the study of viscous contributions to the pressure for the viscous potential flow analysis of Kelvin-Helmholtz instability with tangential magnetic field at the interface of two viscous fluids. Viscosity enters through normal stress balance in the viscous potential flow theory and tangential stresses for two fluids are not continuous at the interface. Here, we have considered viscous pressure in the normal stress balance along with the irrotational pressure and it is assumed that the addition of this viscous pressure will resolve the discontinuity between the tangential stresses and the tangential velocities at the interface. The viscous pressure is derived by mechanical energy equation and this pressure correction applied to compute the growth rate of magnetohydrodynamic Kelvin-Helmholtz instability. A dispersion relation is obtained and stability criterion is given in the terms of critical value of relative velocity. It has been observed that the inclusion of irrotational shear stresses have stabilizing effect on the stability of the system.
    Download Collect
1 2 3

Contact

If you have any feedback, Please follow the official account to submit feedback.

Turn on your phone and scan

Submit Feedback