Far infrared(FIR)radiation(3-100µm)is an electromagnetic spectrum commonly studied for biological effects.This article aims to discuss using Far infrared radiation with sub-division(4-24µm)of this waveband t...Far infrared(FIR)radiation(3-100µm)is an electromagnetic spectrum commonly studied for biological effects.This article aims to discuss using Far infrared radiation with sub-division(4-24µm)of this waveband to stimulate tissues and cells and is considered an effective therapeutic modality for specific medical disorders.The IR application as a medical therapy has advanced rapidly in recent years.For example,IR therapy like IR-emitting apparel and materials that can be run solely by body heat(does not need an external power supply)have been developed.New methods for providing FIR radiation to the human body have emerged due to technological advancements.Specialty saunas and lamps that emit pure FIR radiation have become effective,safe,and widely used therapeutic sources.Fibers infused with thermide,FIR emitting ceramic nanomaterials and knitted into fabrics are used as clothes and apparel to produce FIR radiation and benefit from its effects.A deeper understanding of FIR's significant innovations and biological implications could aid in improving therapeutic efficacy or developing new methods that use FIR wavelengths.展开更多
工程应用中的介质热辐射问题是典型的多尺度问题.基于Boltzmann输运方程建立的各类气体动理学格式,在多尺度瞬态问题中得到了广泛应用.为了克服显式求解方案中CFL条件等的限制,文章通过气体动理学格式实现稳态辐射输运方程的直接求解.SD...工程应用中的介质热辐射问题是典型的多尺度问题.基于Boltzmann输运方程建立的各类气体动理学格式,在多尺度瞬态问题中得到了广泛应用.为了克服显式求解方案中CFL条件等的限制,文章通过气体动理学格式实现稳态辐射输运方程的直接求解.SDUGKS格式由离散统一气体动理学格式(discrete unified gas kinetic scheme,DUGKS)的核心思想发展而来,应用于稳态问题计算.将SDUGKS格式进一步拓展到多尺度的稳态热辐射输运计算.SDUGKS格式继承了DUGKS格式沿特征线离散实现的界面重构,并通过隐式增量格式的单元更新实现对辐射强度的较正,采用逐次迭代法将辐射强度渐近收敛到稳定值.选用多组一维和二维不同尺度的辐射传热算例,通过与特定的解析解以及其他数值方法结果对比,检验了SDUGKS的计算精度和计算效率,并论证了它在多尺度问题中的渐进保持性质.展开更多
文摘Far infrared(FIR)radiation(3-100µm)is an electromagnetic spectrum commonly studied for biological effects.This article aims to discuss using Far infrared radiation with sub-division(4-24µm)of this waveband to stimulate tissues and cells and is considered an effective therapeutic modality for specific medical disorders.The IR application as a medical therapy has advanced rapidly in recent years.For example,IR therapy like IR-emitting apparel and materials that can be run solely by body heat(does not need an external power supply)have been developed.New methods for providing FIR radiation to the human body have emerged due to technological advancements.Specialty saunas and lamps that emit pure FIR radiation have become effective,safe,and widely used therapeutic sources.Fibers infused with thermide,FIR emitting ceramic nanomaterials and knitted into fabrics are used as clothes and apparel to produce FIR radiation and benefit from its effects.A deeper understanding of FIR's significant innovations and biological implications could aid in improving therapeutic efficacy or developing new methods that use FIR wavelengths.
文摘工程应用中的介质热辐射问题是典型的多尺度问题.基于Boltzmann输运方程建立的各类气体动理学格式,在多尺度瞬态问题中得到了广泛应用.为了克服显式求解方案中CFL条件等的限制,文章通过气体动理学格式实现稳态辐射输运方程的直接求解.SDUGKS格式由离散统一气体动理学格式(discrete unified gas kinetic scheme,DUGKS)的核心思想发展而来,应用于稳态问题计算.将SDUGKS格式进一步拓展到多尺度的稳态热辐射输运计算.SDUGKS格式继承了DUGKS格式沿特征线离散实现的界面重构,并通过隐式增量格式的单元更新实现对辐射强度的较正,采用逐次迭代法将辐射强度渐近收敛到稳定值.选用多组一维和二维不同尺度的辐射传热算例,通过与特定的解析解以及其他数值方法结果对比,检验了SDUGKS的计算精度和计算效率,并论证了它在多尺度问题中的渐进保持性质.
