Numerical investigation of the impact of various design parameters of finned-pipes on mixed convection

Ziziphus Spina-Christi bark and other natural debris may be found in abundance the nearby area. The mechanical qualities of all these waste resources are outstanding, they utilized more professionally to create composite materials for a variety applications. Epoxy resin modified with organic particles such as powder has been used reinforcements polymer matrixes instead non-degradable synthetic reinforcement glass, carbon, or aramid. tensile, impact flexural characteristics enhanced epoxy examined this publication. This paper studies effects weight fraction (3, 5, 7 & 9%) on characterization materials. results show that improved when added 7% from Christi. Where hardness increased up 77 (Mpa). Also, strength reached 8.7 (KJ/m2 ) wt% filler added, tensile 18 (MPa) to  45 (MPa). pure is 160 (MPa), it increases linearly addition 173