Bhoraniya, RameshkumarRameshkumarBhoraniyaSwaminathan, GayathriGayathriSwaminathanNarayanan, VinodVinodNarayanan2025-08-312025-08-312023-01-0110.1007/978-981-19-9574-3_32-s2.0-85150172724https://d8.irins.org/handle/IITG2025/27053This chapter presents the global stability characteristics of the divergent channel. The Jeffery–Hamel (JH) and straight-divergent-straight (SDS) channel flows are considered to study the effect of divergence on flow stability. Both flows’ characteristics are compared, and sensitivity to the sub-critical Reynolds number is studied. The sensitivity of the spectra has been studied for different gird sizes, sponging strength and length, and Neumann and extrapolated type boundary conditions. A detailed analysis of the temporal and spatial structure of the small disturbances is reported for the diverging channel flow.falseBook Chapter2195987041-7420230chBook Series0