Sulaiman A.B. and Hamza M.M. 2025. A study on transient flow formation in concentric porous annuli filled with porous material having variable porosity. JOURNAL OF BASICS AND APPLIED SCIENCES RESEARCH. 3, 4 (Jul. 2025), 151–160. DOI:https://doi.org/10.4314/jobasr.v3i4.17.