{"id":"https://openalex.org/W7213528876","doi":"https://doi.org/10.48550/arxiv.2609.18567","title":"Terahertz Radar Inversion for Range-Resolved Solids Concentration Profiling in Gas--Solid Flows","display_name":"Terahertz Radar Inversion for Range-Resolved Solids Concentration Profiling in Gas--Solid Flows","publication_year":2026,"publication_date":"2026-09-16","ids":{"openalex":"https://openalex.org/W7213528876","doi":"https://doi.org/10.48550/arxiv.2609.18567"},"language":"en","primary_location":{"id":"pmh:oai:arXiv.org:2609.18567","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2609.18567","pdf_url":"https://arxiv.org/pdf/2609.18567","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"volume":null,"type":"preprint","is_traditional":true,"indexed_in":["arxiv","datacite"],"open_access":{"is_oa":true,"oa_status":"green","oa_url":"https://arxiv.org/pdf/2609.18567","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5098730644","display_name":"Philip Kjaer Jepsen","orcid":null,"observed_orcids":[]},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Jepsen, Philip Kjaer","raw_affiliation_strings":["Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5058566634","display_name":"Albert R. Monteith","orcid":"https://orcid.org/0000-0002-6086-9328","observed_orcids":["https://orcid.org/0000-0002-6086-9328"]},"institutions":[],"countries":[],"is_corresponding":false,"raw_author_name":"Monteith, Albert","raw_affiliation_strings":[],"raw_orcid":null,"affiliations":[]},{"author_position":"middle","author":{"id":"https://openalex.org/A5087818537","display_name":"Diana Carolina Gu\u00edo\u2010P\u00e9rez","orcid":"https://orcid.org/0000-0001-6415-1148","observed_orcids":["https://orcid.org/0000-0001-6415-1148"]},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Gu\u00edo-P\u00e9rez, Diana Carolina","raw_affiliation_strings":["Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5030673696","display_name":"Lars M. H. Ulander","orcid":"https://orcid.org/0000-0001-5757-9517","observed_orcids":["https://orcid.org/0000-0001-5757-9517"]},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Ulander, Lars","raw_affiliation_strings":["Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5052260944","display_name":"Tomas Bryllert","orcid":"https://orcid.org/0000-0003-3719-3857","observed_orcids":["https://orcid.org/0000-0003-3719-3857"]},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Bryllert, Tomas","raw_affiliation_strings":["Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5038252445","display_name":"Henrik Str\u00f6m","orcid":"https://orcid.org/0000-0002-8581-5174","observed_orcids":["https://orcid.org/0000-0002-8581-5174"]},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Str\u00f6m, Henrik","raw_affiliation_strings":["Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden","institution_ids":["https://openalex.org/I66862912"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5009668527","display_name":"David Pallar\u00e8s","orcid":"https://orcid.org/0000-0002-1574-4075","observed_orcids":["https://orcid.org/0000-0002-1574-4075"]},"institutions":[{"id":"https://openalex.org/I66862912","display_name":"Chalmers University of Technology","ror":"https://ror.org/040wg7k59","country_code":"SE","type":"education","lineage":["https://openalex.org/I66862912"]}],"countries":["SE"],"is_corresponding":false,"raw_author_name":"Pallar\u00e8s, David","raw_affiliation_strings":["Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Division of Energy Technology , Department of Environmental and Energy Sciences , Chalmers University of Technology , SE-412 96 Gothenburg , Sweden","institution_ids":["https://openalex.org/I66862912"]}]}],"institutions":[],"countries_distinct_count":1,"institutions_distinct_count":1,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":null,"apc_paid":null,"fwci":null,"has_fulltext":true,"cited_by_count":0,"citation_normalized_percentile":null,"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/T10752","display_name":"Terahertz technology and applications","score":0.54830002784729,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"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/T10752","display_name":"Terahertz technology and applications","score":0.54830002784729,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"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/T12537","display_name":"Flow Measurement and Analysis","score":0.09860000014305115,"subfield":{"id":"https://openalex.org/subfields/3105","display_name":"Instrumentation"},"field":{"id":"https://openalex.org/fields/31","display_name":"Physics and Astronomy"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T11607","display_name":"Microwave and Dielectric Measurement Techniques","score":0.08060000091791153,"subfield":{"id":"https://openalex.org/subfields/2208","display_name":"Electrical and Electronic Engineering"},"field":{"id":"https://openalex.org/fields/22","display_name":"Engineering"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/terahertz-radar","display_name":"terahertz radar","score":0.9599999785423279},{"id":"https://openalex.org/keywords/gas-solid-flow","display_name":"gas-solid flow","score":0.6150000095367432},{"id":"https://openalex.org/keywords/fmcw-radar","display_name":"FMCW radar","score":0.8550000190734863},{"id":"https://openalex.org/keywords/mie-scattering","display_name":"Mie scattering","score":0.6740000247955322},{"id":"https://openalex.org/keywords/inverse-scattering","display_name":"inverse scattering","score":0.5899999737739563},{"id":"https://openalex.org/keywords/circulating-fluidized-bed","display_name":"circulating fluidized bed","score":0.6100000143051147},{"id":"https://openalex.org/keywords/solid-volume-fraction","display_name":"solid volume fraction","score":0.6119999885559082},{"id":"https://openalex.org/keywords/radar-calibration","display_name":"radar calibration","score":0.6650000214576721},{"id":"https://openalex.org/keywords/copper-powder","display_name":"copper powder","score":0.4790000021457672},{"id":"https://openalex.org/keywords/differential-pressure-measurement","display_name":"differential pressure measurement","score":0.5109999775886536},{"id":"https://openalex.org/keywords/path-integrated-attenuation","display_name":"path-integrated attenuation","score":0.6330000162124634}],"concepts":[{"id":"https://openalex.org/C554190296","wikidata":"https://www.wikidata.org/wiki/Q47528","display_name":"Radar","level":2,"score":0.6599000096321106},{"id":"https://openalex.org/C184652730","wikidata":"https://www.wikidata.org/wiki/Q2357982","display_name":"Attenuation","level":2,"score":0.5914999842643738},{"id":"https://openalex.org/C24245907","wikidata":"https://www.wikidata.org/wiki/Q498957","display_name":"Particulates","level":2,"score":0.5011000037193298},{"id":"https://openalex.org/C165838908","wikidata":"https://www.wikidata.org/wiki/Q736777","display_name":"Calibration","level":2,"score":0.4796000123023987},{"id":"https://openalex.org/C1893757","wikidata":"https://www.wikidata.org/wiki/Q3653001","display_name":"Inversion (geology)","level":3,"score":0.45500001311302185},{"id":"https://openalex.org/C192562407","wikidata":"https://www.wikidata.org/wiki/Q228736","display_name":"Materials science","level":0,"score":0.3912000060081482},{"id":"https://openalex.org/C544778455","wikidata":"https://www.wikidata.org/wiki/Q753","display_name":"Copper","level":2,"score":0.35989999771118164},{"id":"https://openalex.org/C202799725","wikidata":"https://www.wikidata.org/wiki/Q272035","display_name":"Accuracy and precision","level":2,"score":0.2919999957084656},{"id":"https://openalex.org/C199289684","wikidata":"https://www.wikidata.org/wiki/Q83353","display_name":"Mineralogy","level":1,"score":0.28949999809265137},{"id":"https://openalex.org/C143606050","wikidata":"https://www.wikidata.org/wiki/Q1377019","display_name":"Inverse transform sampling","level":3,"score":0.2793000042438507},{"id":"https://openalex.org/C120665830","wikidata":"https://www.wikidata.org/wiki/Q14620","display_name":"Optics","level":1,"score":0.27459999918937683},{"id":"https://openalex.org/C57879066","wikidata":"https://www.wikidata.org/wiki/Q41217","display_name":"Mechanics","level":1,"score":0.272599995136261},{"id":"https://openalex.org/C62649853","wikidata":"https://www.wikidata.org/wiki/Q199687","display_name":"Remote sensing","level":1,"score":0.26899999380111694},{"id":"https://openalex.org/C107816215","wikidata":"https://www.wikidata.org/wiki/Q647887","display_name":"Terahertz radiation","level":2,"score":0.267300009727478},{"id":"https://openalex.org/C159774933","wikidata":"https://www.wikidata.org/wiki/Q902086","display_name":"Attenuation coefficient","level":2,"score":0.2578999996185303}],"mesh":[],"locations_count":2,"locations":[{"id":"pmh:oai:arXiv.org:2609.18567","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2609.18567","pdf_url":"https://arxiv.org/pdf/2609.18567","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},{"id":"doi:10.48550/arxiv.2609.18567","doi":"https://doi.org/10.48550/arxiv.2609.18567","is_oa":true,"landing_page_url":"https://doi.org/10.48550/arxiv.2609.18567","pdf_url":null,"source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":null,"is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"Preprint"}],"best_oa_location":{"id":"pmh:oai:arXiv.org:2609.18567","doi":null,"is_oa":true,"landing_page_url":"https://arxiv.org/abs/2609.18567","pdf_url":"https://arxiv.org/pdf/2609.18567","source":{"id":"https://openalex.org/S4306400194","display_name":"arXiv (Cornell University)","issn_l":"2331-8422","issn":["2331-8422"],"is_oa":true,"is_in_doaj":false,"is_core":false,"listed_in":[],"host_organization":"https://openalex.org/I205783295","host_organization_name":"Cornell University","host_organization_lineage":["https://openalex.org/I205783295"],"host_organization_lineage_names":[],"type":"repository"},"license":null,"license_id":null,"version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":null,"raw_type":"text"},"sustainable_development_goals":[],"study_designs":[],"awards":[{"id":"https://openalex.org/G7577742793","display_name":"Disclosing the particle scale to enable reliable full-scale simulations of gas-solids flow","funder_award_id":"2023-03970","funder_id":"https://openalex.org/F4320322581","funder_display_name":"Vetenskapsr\u00e5det"}],"funders":[{"id":"https://openalex.org/F4320322581","display_name":"Vetenskapsr\u00e5det","ror":"https://ror.org/03zttf063"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W7213528876.pdf","grobid_xml":"https://content.openalex.org/works/W7213528876.grobid-xml"},"referenced_works_count":0,"referenced_works":[],"related_works":["https://openalex.org/W4311092109","https://openalex.org/W7150975411","https://openalex.org/W4378907208","https://openalex.org/W2009968928","https://openalex.org/W3150259903","https://openalex.org/W1977647407","https://openalex.org/W2047795583","https://openalex.org/W2082862826","https://openalex.org/W2774106538","https://openalex.org/W2489141195"],"abstract_inverted_index":{"A":[0],"stable":[1,51],"inversion":[2,31],"method":[3,40,94],"is":[4,76],"developed":[5],"to":[6,49,149],"reconstruct":[7],"millimeter-scale":[8],"solids-concentration":[9],"profiles":[10,130],"in":[11,104],"particulate":[12,24],"suspensions":[13],"from":[14,101],"monostatic":[15],"sub-terahertz":[16],"frequency-modulated":[17],"continuous-wave":[18],"(FMCW)":[19],"radar":[20,36,145],"measurements.":[21,70],"In":[22],"industrial":[23],"flows,":[25],"cumulative":[26],"attenuation":[27],"renders":[28],"the":[29,33,59,144],"direct":[30],"of":[32,153],"path-integrated":[34],"volume-scattering":[35],"equation":[37],"ill-conditioned.":[38],"The":[39,71,93,126],"resolves":[41],"this":[42],"by":[43,78],"an":[44,55,88],"ensemble-averaged":[45],"Mie-scattering":[46],"closure":[47],"coupled":[48],"a":[50,105],"backward-integration":[52],"scheme,":[53],"yielding":[54],"analytical":[56],"solution":[57],"for":[58],"range-resolved":[60],"solids":[61,141,150],"concentration":[62,69],"without":[63],"case-specific":[64],"parameter":[65],"fitting":[66],"against":[67,97],"reference":[68],"required":[72],"range-dependent":[73],"system":[74],"response":[75],"determined":[77],"absolute":[79],"near-":[80],"and":[81,115,128,143],"far-field":[82],"calibration":[83],"via":[84],"external":[85],"substitution":[86],"with":[87,112],"electrically":[89],"large":[90],"metallic":[91],"sphere.":[92],"was":[95],"evaluated":[96],"solids-volume-fraction":[98],"estimates":[99],"derived":[100],"differential-pressure":[102],"measurements":[103],"3.1":[106],"m-tall":[107],"circulating":[108],"fluidized-bed":[109],"riser":[110],"operated":[111],"ambient":[113],"air":[114],"copper":[116],"powder":[117],"(median":[118],"diameter":[119],"32.6":[120],"$\u03bc$m,":[121],"density":[122],"8920":[123],"kg":[124],"m$^{-3}$).":[125],"radar-derived":[127],"pressure-derived":[129],"agreed":[131],"well":[132],"across":[133],"three":[134],"superficial":[135],"gas":[136],"velocities":[137],"producing":[138],"distinct":[139],"axial":[140],"distributions,":[142],"indicates":[146],"sensitivity":[147],"down":[148],"volume":[151],"fractions":[152],"order":[154],"$10^{-6}$.":[155]},"counts_by_year":[],"updated_date":"2026-10-28T10:33:24.094632","created_date":"2026-09-18T00:00:00"}