Purpose-This　study　aims　to　perform　an　in-depth　analysis　of　double-diffusive　natural　convection　(DDNC)　in　an　irregularly　shaped　porous　cavity.　We　investigate　the　convective　heat　transfer　process　induced　by　the　lower　wall　treated　as　a　heat　source　while　the　side　walls　of　the　enclosure　are　maintained　at　a　lower　temperature　and　concentration,　and　the　remaining　wall　is　adiabatic.　Various　factors,　such　as　the　Rayleigh　number,　Darcy　effects,　Hartmann　number,　Lewis　number　and　effects　of　magnetic　inclination　are　evaluated　for　their　influence　on　flow　dynamics　and　heat　distribution.　Design/methodology/approach-After　validating　the　results,　the　FEM　(finite　element　method)　is　used　to　simulate　the　flow　pattern,　temperature　variations,　and　concentration　by　solving　the　nonlinear　partial　differential　equations　with　the　modified　Rayleigh　number　(104　＜=　Ra　＜=　107),　Darcy　number　(10-4　＜=　Da　＜=　10-1),　Lewis　number　(0.1　＜=　Le　＜=　10),　and　Hartmann　number　0　＜=　Ha　＜=　40　as　the　dimensionless　operating　parameters.　Findings-The　finding　shows　that　the　patterns　of　convection　and　the　shape　of　the　isotherms　within　porous　enclosures　are　notably　affected　by　the　angle　of　the　applied　magnetic　field.　This　study　enhances　our　understanding　of　how　double-diffusive　natural　convection　(DDNC)　operates　in　these　enclosures,　which　helps　improve　heating　and　cooling　technologies　in　various　engineering　fields.　Research　limitations/implications-Numerical　and　experimental　extensions　of　the　present　study　make　it　possible　to　investigate　differences　in　thermal　performance　as　a　result　of　various　curvatures,　orientations,　boundary　conditions,　and　the　use　of　three-dimensional　analysis　and　other　working　fluids.　Practical　implications-The　geometry　configurations　used　in　this　study　have　wide-ranging　applications　in　engineering　fields,　such　as　in　heat　exchangers,　crystallization,　microelectronics,　energy　storage,　mixing,　food　processing,　and　biomedical　systems.　Originality/value-This　study　shows　how　an　inclined　magnetic　field　affects　double-diffusive　natural　convection　(DDNC)　within　a　porous　system　featuring　an　irregularly　shaped　cavity,　considering　various　multiphysical　conditions.