Numerical study of entropy generation for forced convection flow and heat transfer of a Jeffrey fluid over a stretching sheet

摘要: Abstract Entropy generation for the steady two-dimensional laminar forced convection flow and heat transfer of an incompressible Jeffrey non-Newtonian fluid over a linearly stretching, impermeable isothermal sheet is numerically investigated. The governing differential equations continuity, momentum energy are transformed using suitable similarity transformations to two nonlinear coupled ordinary (ODEs). Then ODEs solved by applying numerical implicit Keller’s box method. effects various parameters including Deborah number, ratio relaxation retardation times, Prandtl Eckert Reynolds number Brinkman on dimensionless velocity, temperature entropy profiles analyzed. results reveal that increases with increase while times causes reduce. A comparative study from exact solution velocity gradient at surface also performed. comparison shows excellent agreement within 0.05% error.