ViewModels/MeasurementResult.cs

@@ -19,21 +19,30 @@ public partial class MeasurementResult : ObservableObject
 
     public void CalculateVhcAndCp(double density)
     {
-        CalculateVhc();  // 先计算 VHC
-
-        // 日志：记录计算前的参数
-        Debug.WriteLine($"[MeasurementResult] 计算比热容 - 密度: {density} kg/m³, 体积热容: {VolumetricHeatCapacity} kJ/(m³·K)");
+        // 1. 计算体积热容 VHC = λ / α
+        // 注意：ThermalDiffusivity 已经是标准单位 m²/s，绝对不能再乘 1e-6！
+        if (ThermalDiffusivity > 0)
+        {
+            double vhc_J = ThermalConductivity / ThermalDiffusivity; // 单位: J/(m³·K)
+            VolumetricHeatCapacity = vhc_J / 1000.0; // 转换为 kJ/(m³·K)
+        }
+        else
+        {
+            VolumetricHeatCapacity = 0;
+        }
 
+        // 2. 计算比热容 Cp = VHC / ρ
         if (density > 0)
         {
-            SpecificHeatCapacity = VolumetricHeatCapacity * 1000 / density;
-            Debug.WriteLine($"[MeasurementResult] 计算得到比热容: {SpecificHeatCapacity} J/(kg·K)");
+            // VHC 转回 J/(m³·K) 除以密度
+            SpecificHeatCapacity = (VolumetricHeatCapacity * 1000.0) / density;
         }
         else
         {
             SpecificHeatCapacity = 0;
-            Debug.WriteLine($"[MeasurementResult] 警告: 密度无效 (density={density})，比热容设为0");
         }
+
+        Debug.WriteLine($"[MeasurementResult] 计算完成: VHC={VolumetricHeatCapacity:F2} kJ/(m³·K), Cp={SpecificHeatCapacity:F2} J/(kg·K)");
     }
 
     [ObservableProperty]