level 1
T孤影成双T
楼主
模拟情景：
容器内存在油和水（不互溶），容器上方气相空间为水蒸气和油蒸汽的混合气相，模拟随着环境温度升高，容器内的温度、压力变化。
多相流模型设置：
由于油水不互溶，且存在相变过程，开启多相流VOF模型；由于气相为混合气，开启组分输运模型。设置混合气相为主相，油相、水相为次相。
问题1：
“Important: In general, you should use only one mass transfer mechanism when you employ one of the available mass transfer models (see Step 7). Although using multiple mass transfer mechanisms is allowed for any pairs of phases (including the same pair of phases), it is not recommended because the mass transfer models have been fundamentally developed for a single mass transfer process. These models do not account for possible interactions between two mass transfer mechanisms in a flow system. In order to account for all relevant physics using UDFs in multiple mass transfer mechanisms, you can use the user-defined option. For additional restrictions when using multiple mass transfer mechanisms, see Step 7.”这是fluent手册中关于传质模型的注意事项，它的意思是只能加入一种传质过程吗？比如只能模拟水与水蒸气间的相变，不能再添加上油和油蒸汽间的相变，类似图片中这样？或者要同时模拟只能添加UDF？
问题2：
如果只能用UDF的话，那么是在上图中两种传质过程的机理里，分别添加DEFINE_MASS_TRANSFER？还是说要在各相添加源项UDF？
求助！！！
2025年02月19日 08点02分
1
容器内存在油和水（不互溶），容器上方气相空间为水蒸气和油蒸汽的混合气相，模拟随着环境温度升高，容器内的温度、压力变化。
多相流模型设置：
由于油水不互溶，且存在相变过程，开启多相流VOF模型；由于气相为混合气，开启组分输运模型。设置混合气相为主相，油相、水相为次相。
问题1：
“Important: In general, you should use only one mass transfer mechanism when you employ one of the available mass transfer models (see Step 7). Although using multiple mass transfer mechanisms is allowed for any pairs of phases (including the same pair of phases), it is not recommended because the mass transfer models have been fundamentally developed for a single mass transfer process. These models do not account for possible interactions between two mass transfer mechanisms in a flow system. In order to account for all relevant physics using UDFs in multiple mass transfer mechanisms, you can use the user-defined option. For additional restrictions when using multiple mass transfer mechanisms, see Step 7.”这是fluent手册中关于传质模型的注意事项，它的意思是只能加入一种传质过程吗？比如只能模拟水与水蒸气间的相变，不能再添加上油和油蒸汽间的相变，类似图片中这样？或者要同时模拟只能添加UDF？
问题2：如果只能用UDF的话，那么是在上图中两种传质过程的机理里，分别添加DEFINE_MASS_TRANSFER？还是说要在各相添加源项UDF？
求助！！！
