{"id":"https://openalex.org/W7225659643","doi":"https://doi.org/10.1088/1873-7005/aebfc2","title":"Rotational magnetohydrodynamic couple stress fluid flow between two eccentric spheres","display_name":"Rotational magnetohydrodynamic couple stress fluid flow between two eccentric spheres","publication_year":2026,"publication_date":"2026-11-09","ids":{"openalex":"https://openalex.org/W7225659643","doi":"https://doi.org/10.1088/1873-7005/aebfc2"},"language":"en","primary_location":{"id":"doi:10.1088/1873-7005/aebfc2","doi":"https://doi.org/10.1088/1873-7005/aebfc2","is_oa":true,"landing_page_url":"https://doi.org/10.1088/1873-7005/aebfc2","pdf_url":"https://iopscience.iop.org/article/10.1088/1873-7005/aebfc2/pdf","source":{"id":"https://openalex.org/S98158633","display_name":"Fluid Dynamics Research","issn_l":"0169-5983","issn":["0169-5983","1873-7005"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-d","jufo-1","norway-1","poland-70","russia-white-list-2"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Fluid Dynamics Research","raw_type":"journal-article"},"volume":null,"type":"article","is_traditional":true,"indexed_in":["crossref"],"open_access":{"is_oa":true,"oa_status":"bronze","oa_url":"https://iopscience.iop.org/article/10.1088/1873-7005/aebfc2/pdf","any_repository_has_fulltext":false},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5005288828","display_name":"Amal M. Al-Hanaya","orcid":"https://orcid.org/0000-0002-5695-3009","observed_orcids":["https://orcid.org/0000-0002-5695-3009"]},"institutions":[{"id":"https://openalex.org/I106778892","display_name":"Princess Nourah bint Abdulrahman University","ror":"https://ror.org/05b0cyh02","country_code":"SA","type":"education","lineage":["https://openalex.org/I106778892"]}],"countries":["SA"],"is_corresponding":false,"raw_author_name":"Amal Al-Hanaya","raw_affiliation_strings":["Princess Nora bint Abdul Rahman University"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Princess Nora bint Abdul Rahman University","institution_ids":["https://openalex.org/I106778892"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5035124227","display_name":"Shreen El\u2010Sapa","orcid":"https://orcid.org/0000-0001-8811-4421","observed_orcids":["https://orcid.org/0000-0001-8811-4421"]},"institutions":[{"id":"https://openalex.org/I106778892","display_name":"Princess Nourah bint Abdulrahman University","ror":"https://ror.org/05b0cyh02","country_code":"SA","type":"education","lineage":["https://openalex.org/I106778892"]}],"countries":["SA"],"is_corresponding":false,"raw_author_name":"Shreen El-Sapa","raw_affiliation_strings":["Princess Nora bint Abdul Rahman University"],"raw_orcid":"https://orcid.org/0000-0001-8811-4421","affiliations":[{"raw_affiliation_string":"Princess Nora bint Abdul Rahman University","institution_ids":["https://openalex.org/I106778892"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":["https://openalex.org/I106778892"],"apc_list":{"value":3325,"currency":"USD","value_usd":3325},"apc_paid":null,"fwci":0.0,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":{"value":0.0,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":null,"biblio":{"volume":null,"issue":null,"first_page":null,"last_page":null},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T13951","display_name":"Fluid dynamics and aerodynamics studies","score":0.6762999892234802,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T13951","display_name":"Fluid dynamics and aerodynamics studies","score":0.6762999892234802,"subfield":{"id":"https://openalex.org/subfields/2206","display_name":"Computational Mechanics"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11379","display_name":"Rheology and Fluid Dynamics Studies","score":0.20170000195503235,"subfield":{"id":"https://openalex.org/subfields/1507","display_name":"Fluid Flow and Transfer Processes"},"field":{"id":"https://openalex.org/fields/15","display_name":"Chemical Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10940","display_name":"Navier-Stokes equation solutions","score":0.03240000084042549,"subfield":{"id":"https://openalex.org/subfields/2604","display_name":"Applied Mathematics"},"field":{"id":"https://openalex.org/fields/26","display_name":"Mathematics"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/mhd-flow","display_name":"magnetohydrodynamic flow","score":0.9409999847412109},{"id":"https://openalex.org/keywords/couple-stress-fluid","display_name":"couple stress fluid","score":0.9539999961853027},{"id":"https://openalex.org/keywords/eccentric-spheres","display_name":"eccentric spheres","score":0.9480000138282776},{"id":"https://openalex.org/keywords/hydrodynamic-torque","display_name":"hydrodynamic torque","score":0.8840000033378601},{"id":"https://openalex.org/keywords/hartmann-number","display_name":"Hartmann number","score":0.9459999799728394},{"id":"https://openalex.org/keywords/stokes-flow","display_name":"Stokes flow","score":0.6340000033378601},{"id":"https://openalex.org/keywords/boundary-collocation-method","display_name":"boundary collocation method","score":0.8669999837875366},{"id":"https://openalex.org/keywords/axisymmetric-flow","display_name":"axisymmetric flow","score":0.7369999885559082},{"id":"https://openalex.org/keywords/size-ratio-effects","display_name":"size ratio effects","score":0.550000011920929},{"id":"https://openalex.org/keywords/magnetic-field-effects-on-fluid-flow","display_name":"magnetic field effects on flow","score":0.41200000047683716}],"concepts":[{"id":"https://openalex.org/C57879066","wikidata":"https://www.wikidata.org/wiki/Q41217","display_name":"Mechanics","level":1,"score":0.7139999866485596},{"id":"https://openalex.org/C144171764","wikidata":"https://www.wikidata.org/wiki/Q48103","display_name":"Torque","level":2,"score":0.6398000121116638},{"id":"https://openalex.org/C42471609","wikidata":"https://www.wikidata.org/wiki/Q1779048","display_name":"Magnetohydrodynamic drive","level":4,"score":0.6334999799728394},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.5184999704360962},{"id":"https://openalex.org/C182748727","wikidata":"https://www.wikidata.org/wiki/Q178932","display_name":"Reynolds number","level":3,"score":0.5040000081062317},{"id":"https://openalex.org/C33026886","wikidata":"https://www.wikidata.org/wiki/Q593950","display_name":"Rotational symmetry","level":2,"score":0.4700999855995178},{"id":"https://openalex.org/C74650414","wikidata":"https://www.wikidata.org/wiki/Q11397","display_name":"Classical mechanics","level":1,"score":0.4546999931335449},{"id":"https://openalex.org/C2777869274","wikidata":"https://www.wikidata.org/wiki/Q1587280","display_name":"Hartmann number","level":5,"score":0.435699999332428},{"id":"https://openalex.org/C72921944","wikidata":"https://www.wikidata.org/wiki/Q206621","display_name":"Drag","level":2,"score":0.43529999256134033},{"id":"https://openalex.org/C38349280","wikidata":"https://www.wikidata.org/wiki/Q1434290","display_name":"Flow (mathematics)","level":2,"score":0.43389999866485596},{"id":"https://openalex.org/C1633027","wikidata":"https://www.wikidata.org/wiki/Q815820","display_name":"Computational fluid dynamics","level":2,"score":0.39719998836517334},{"id":"https://openalex.org/C19191322","wikidata":"https://www.wikidata.org/wiki/Q674202","display_name":"Stokes flow","level":3,"score":0.384799987077713},{"id":"https://openalex.org/C158622935","wikidata":"https://www.wikidata.org/wiki/Q660848","display_name":"Nonlinear system","level":2,"score":0.3709999918937683},{"id":"https://openalex.org/C182310444","wikidata":"https://www.wikidata.org/wiki/Q1332643","display_name":"Boundary value problem","level":2,"score":0.3682999908924103},{"id":"https://openalex.org/C5594486","wikidata":"https://www.wikidata.org/wiki/Q161635","display_name":"Angular velocity","level":2,"score":0.3668000102043152},{"id":"https://openalex.org/C31532427","wikidata":"https://www.wikidata.org/wiki/Q2549249","display_name":"Magnetohydrodynamics","level":3,"score":0.3668000102043152},{"id":"https://openalex.org/C77576233","wikidata":"https://www.wikidata.org/wiki/Q1545856","display_name":"Flow separation","level":3,"score":0.3497999906539917},{"id":"https://openalex.org/C155675718","wikidata":"https://www.wikidata.org/wiki/Q161254","display_name":"Angular momentum","level":2,"score":0.3440999984741211},{"id":"https://openalex.org/C90278072","wikidata":"https://www.wikidata.org/wiki/Q216320","display_name":"Fluid dynamics","level":2,"score":0.3377000093460083},{"id":"https://openalex.org/C63479239","wikidata":"https://www.wikidata.org/wiki/Q7353546","display_name":"Robustness (evolution)","level":3,"score":0.33730000257492065},{"id":"https://openalex.org/C100784341","wikidata":"https://www.wikidata.org/wiki/Q1340491","display_name":"Eccentric","level":2,"score":0.3352999985218048},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.33309999108314514},{"id":"https://openalex.org/C77461463","wikidata":"https://www.wikidata.org/wiki/Q7827201","display_name":"Torsion (gastropod)","level":2,"score":0.3240000009536743},{"id":"https://openalex.org/C127172972","wikidata":"https://www.wikidata.org/wiki/Q128709","display_name":"Viscosity","level":2,"score":0.31850001215934753},{"id":"https://openalex.org/C21200559","wikidata":"https://www.wikidata.org/wiki/Q7451068","display_name":"Sensitivity (control systems)","level":2,"score":0.3082999885082245},{"id":"https://openalex.org/C147196274","wikidata":"https://www.wikidata.org/wiki/Q7319685","display_name":"Reynolds stress","level":3,"score":0.3001999855041504},{"id":"https://openalex.org/C207467116","wikidata":"https://www.wikidata.org/wiki/Q4385666","display_name":"Inverse","level":2,"score":0.29589998722076416},{"id":"https://openalex.org/C134306372","wikidata":"https://www.wikidata.org/wiki/Q7754","display_name":"Mathematical analysis","level":1,"score":0.28679999709129333},{"id":"https://openalex.org/C2781212128","wikidata":"https://www.wikidata.org/wiki/Q2256181","display_name":"Duct (anatomy)","level":2,"score":0.2597000002861023},{"id":"https://openalex.org/C43133876","wikidata":"https://www.wikidata.org/wiki/Q172145","display_name":"Fluid mechanics","level":2,"score":0.2590999901294708},{"id":"https://openalex.org/C121704545","wikidata":"https://www.wikidata.org/wiki/Q11425899","display_name":"Immersed boundary method","level":3,"score":0.2574999928474426},{"id":"https://openalex.org/C111335779","wikidata":"https://www.wikidata.org/wiki/Q3454686","display_name":"Reduction (mathematics)","level":2,"score":0.25369998812675476},{"id":"https://openalex.org/C74050887","wikidata":"https://www.wikidata.org/wiki/Q848368","display_name":"Rotation (mathematics)","level":2,"score":0.2515000104904175}],"mesh":[],"locations_count":1,"locations":[{"id":"doi:10.1088/1873-7005/aebfc2","doi":"https://doi.org/10.1088/1873-7005/aebfc2","is_oa":true,"landing_page_url":"https://doi.org/10.1088/1873-7005/aebfc2","pdf_url":"https://iopscience.iop.org/article/10.1088/1873-7005/aebfc2/pdf","source":{"id":"https://openalex.org/S98158633","display_name":"Fluid Dynamics Research","issn_l":"0169-5983","issn":["0169-5983","1873-7005"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-d","jufo-1","norway-1","poland-70","russia-white-list-2"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Fluid Dynamics Research","raw_type":"journal-article"}],"best_oa_location":{"id":"doi:10.1088/1873-7005/aebfc2","doi":"https://doi.org/10.1088/1873-7005/aebfc2","is_oa":true,"landing_page_url":"https://doi.org/10.1088/1873-7005/aebfc2","pdf_url":"https://iopscience.iop.org/article/10.1088/1873-7005/aebfc2/pdf","source":{"id":"https://openalex.org/S98158633","display_name":"Fluid Dynamics Research","issn_l":"0169-5983","issn":["0169-5983","1873-7005"],"is_oa":false,"is_in_doaj":false,"is_core":true,"listed_in":["cwts-core","dongbi-d","jufo-1","norway-1","poland-70","russia-white-list-2"],"host_organization":"https://openalex.org/P4310320083","host_organization_name":"IOP Publishing","host_organization_lineage":["https://openalex.org/P4310320083","https://openalex.org/P4310311669"],"host_organization_lineage_names":["IOP Publishing","Institute of Physics"],"type":"journal"},"license":null,"license_id":null,"version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Fluid Dynamics Research","raw_type":"journal-article"},"sustainable_development_goals":[],"study_designs":[],"awards":[],"funders":[],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7225659643.pdf","grobid_xml":"https://content.openalex.org/works/W7225659643.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W4406269681","https://openalex.org/W2883073846","https://openalex.org/W7167030553","https://openalex.org/W4409048252","https://openalex.org/W4392023942","https://openalex.org/W4319317485","https://openalex.org/W4296888635","https://openalex.org/W2088971369","https://openalex.org/W1996186463","https://openalex.org/W4387124565"],"abstract_inverted_index":{"Abstract":[0],"This":[1],"study":[2],"presents":[3],"a":[4,15,29,44,94,157,165,192],"comprehensive":[5],"analysis":[6],"of":[7,14,62,100,133,160,168,177,195,204,231],"the":[8,34,50,60,63,76,81,89,101,119,123,130,134,138,143,151,186,200,205,209,222,229,232],"axisymmetric":[9],"magnetohydrodynamic":[10],"(MHD)":[11],"flow":[12,25,124],"behavior":[13],"couple-stress":[16,73,102],"fluid":[17],"confined":[18],"between":[19],"two":[20],"eccentric":[21,107],"spheres.":[22],"Under":[23],"creeping":[24],"conditions":[26],"characterized":[27],"by":[28,147],"low":[30],"Reynolds":[31],"number":[32],"regime,":[33],"governing":[35],"nonlinear":[36],"momentum":[37],"equations":[38],"are":[39,212],"formulated":[40],"and":[41,72,106,181,202,227],"solved":[42],"using":[43],"semi-analytical":[45,234],"computational":[46,207],"framework":[47],"based":[48],"on":[49,58,75,80],"boundary":[51],"collocation":[52],"method.":[53],"Particular":[54],"emphasis":[55],"is":[56,114],"placed":[57],"elucidating":[59],"effects":[61],"Hartmann":[64,104],"number,":[65,105],"rotational":[66],"angular":[67],"velocities,":[68],"geometric":[69,131],"size":[70,120],"ratio,":[71],"parameters":[74],"hydrodynamic":[77,91,144],"torque":[78,92,145,193],"exerted":[79],"inner":[82],"sphere.":[83],"The":[84],"numerical":[85],"findings":[86],"reveal":[87],"that":[88],"total":[90],"exhibits":[93],"pronounced":[95],"enhancement":[96],"with":[97,116],"increasing":[98,185],"values":[99,176],"parameter,":[103],"separation":[108,152],"distance,":[109],"whereas":[110],"an":[111],"inverse":[112],"dependence":[113],"observed":[115],"respect":[117],"to":[118,129,164],"ratio.":[121],"Moreover,":[122],"characteristics":[125],"demonstrate":[126],"substantial":[127],"sensitivity":[128],"configuration":[132],"system.":[135],"Specifically,":[136],"for":[137],"case":[139],"$a_1/a_2":[140],"=":[141,162,170,179,183],"0.5$,":[142],"increases":[146],"approximately":[148],"$9890\\%$":[149],"as":[150],"parameter":[153,188],"$\\delta$":[154],"varies":[155],"from":[156],"wide":[158],"clearance":[159],"$\\delta":[161,169,182],"0.9$":[163],"tight":[166],"confinement":[167],"0.01$.":[171],"In":[172],"contrast,":[173],"at":[174],"fixed":[175],"$\\eta":[178],"0.05$":[180],"0.01$,":[184],"magnetic":[187],"$M$":[189],"results":[190,211],"in":[191,221],"reduction":[194],"nearly":[196],"$72.47\\%$.":[197],"To":[198],"establish":[199],"reliability":[201],"accuracy":[203],"present":[206],"methodology,":[208],"obtained":[210],"systematically":[213],"validated":[214],"against":[215],"previously":[216],"published":[217],"benchmark":[218],"solutions":[219],"available":[220],"literature,":[223],"demonstrating":[224],"excellent":[225],"agreement":[226],"confirming":[228],"robustness":[230],"proposed":[233],"approach.":[235]},"counts_by_year":[],"updated_date":"2026-11-11T12:16:26.678958","created_date":"2026-11-10T00:00:00"}